use single sync.map for all output states, moved common logic out of outputs logic

app/vmagent/remotewrite/remotewrite_test.go

@@ -53,7 +53,7 @@ func TestGetLabelsHash_Distribution(t *testing.T) {
 }
 
 func TestRemoteWriteContext_TryPush_ImmutableTimeseries(t *testing.T) {
-	f := func(streamAggrConfig, relabelConfig string, dedupInterval time.Duration, keepInput, dropInput bool, input string) {
+	f := func(streamAggrConfig, relabelConfig string, stateSize int, dedupInterval time.Duration, keepInput, dropInput bool, input string) {
 		t.Helper()
 		perURLRelabel, err := promrelabel.ParseRelabelConfigsData([]byte(relabelConfig))
 		if err != nil {
@@ -77,12 +77,15 @@ func TestRemoteWriteContext_TryPush_ImmutableTimeseries(t *testing.T) {
 			rowsDroppedByRelabel:   metrics.GetOrCreateCounter(`bar`),
 		}
 		if dedupInterval > 0 {
-			rwctx.deduplicator = streamaggr.NewDeduplicator(nil, dedupInterval, nil, "dedup-global")
+			rwctx.deduplicator = streamaggr.NewDeduplicator(nil, stateSize, dedupInterval, nil, "dedup-global")
 		}
 
 		if streamAggrConfig != "" {
 			pushNoop := func(_ []prompbmarshal.TimeSeries) {}
-			sas, err := streamaggr.LoadFromData([]byte(streamAggrConfig), pushNoop, nil, "global")
+			opts := streamaggr.Options{
+				StateSize: stateSize,
+			}
+			sas, err := streamaggr.LoadFromData([]byte(streamAggrConfig), pushNoop, &opts, "global")
 			if err != nil {
 				t.Fatalf("cannot load streamaggr configs: %s", err)
 			}
@@ -114,13 +117,13 @@ func TestRemoteWriteContext_TryPush_ImmutableTimeseries(t *testing.T) {
 - action: keep
   source_labels: [env]
   regex: "dev"
-`, 0, false, false, `
+`, 1, 0, false, false, `
 metric{env="dev"} 10
 metric{env="bar"} 20
 metric{env="dev"} 15
 metric{env="bar"} 25
 `)
-	f(``, ``, time.Hour, false, false, `
+	f(``, ``, 2, time.Hour, false, false, `
 metric{env="dev"} 10
 metric{env="foo"} 20
 metric{env="dev"} 15
@@ -130,7 +133,7 @@ metric{env="foo"} 25
 - action: keep
   source_labels: [env]
   regex: "dev"
-`, time.Hour, false, false, `
+`, 3, time.Hour, false, false, `
 metric{env="dev"} 10
 metric{env="bar"} 20
 metric{env="dev"} 15
@@ -140,7 +143,7 @@ metric{env="bar"} 25
 - action: keep
   source_labels: [env]
   regex: "dev"
-`, time.Hour, true, false, `
+`, 6, time.Hour, true, false, `
 metric{env="test"} 10
 metric{env="dev"} 20
 metric{env="foo"} 15
@@ -150,7 +153,7 @@ metric{env="dev"} 25
 - action: keep
   source_labels: [env]
   regex: "dev"
-`, time.Hour, false, true, `
+`, 10, time.Hour, false, true, `
 metric{env="foo"} 10
 metric{env="dev"} 20
 metric{env="foo"} 15
@@ -160,7 +163,7 @@ metric{env="dev"} 25
 - action: keep
   source_labels: [env]
   regex: "dev"
-`, time.Hour, true, true, `
+`, 11, time.Hour, true, true, `
 metric{env="dev"} 10
 metric{env="test"} 20
 metric{env="dev"} 15

app/vmagent/remotewrite/streamaggr.go

@@ -35,6 +35,7 @@ var (
 		"clients pushing data into the vmagent. See https://docs.victoriametrics.com/stream-aggregation/#ignore-aggregation-intervals-on-start")
 	streamAggrGlobalDropInputLabels = flagutil.NewArrayString("streamAggr.dropInputLabels", "An optional list of labels to drop from samples for aggregator "+
 		"before stream de-duplication and aggregation . See https://docs.victoriametrics.com/stream-aggregation/#dropping-unneeded-labels")
+	streamAggrGlobalStateSize = flag.Int("streamAggr.stateSize", 1, "Amount of aggregation intervals")
 
 	// Per URL config
 	streamAggrConfig = flagutil.NewArrayString("remoteWrite.streamAggr.config", "Optional path to file with stream aggregation config for the corresponding -remoteWrite.url. "+
@@ -59,6 +60,7 @@ var (
 		"before stream de-duplication and aggregation with -remoteWrite.streamAggr.config and -remoteWrite.streamAggr.dedupInterval at the corresponding -remoteWrite.url. "+
 		"Multiple labels per remoteWrite.url must be delimited by '^^': -remoteWrite.streamAggr.dropInputLabels='replica^^az,replica'. "+
 		"See https://docs.victoriametrics.com/stream-aggregation/#dropping-unneeded-labels")
+	streamAggrStateSize = flagutil.NewArrayInt("remoteWrite.streamAggr.stateSize", 1, "Amount of aggregation intervals")
 )
 
 // CheckStreamAggrConfigs checks -remoteWrite.streamAggr.config and -streamAggr.config.
@@ -134,8 +136,11 @@ func initStreamAggrConfigGlobal() {
 		metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_streamaggr_config_reload_success_timestamp_seconds{path=%q}`, filePath)).Set(fasttime.UnixTimestamp())
 	}
 	dedupInterval := streamAggrGlobalDedupInterval.Duration()
+	if *streamAggrGlobalStateSize < 1 {
+		logger.Fatalf("--streamAggr.stateSize should be greater than 0")
+	}
 	if dedupInterval > 0 {
-		deduplicatorGlobal = streamaggr.NewDeduplicator(pushToRemoteStoragesTrackDropped, dedupInterval, *streamAggrGlobalDropInputLabels, "dedup-global")
+		deduplicatorGlobal = streamaggr.NewDeduplicator(pushToRemoteStoragesTrackDropped, *streamAggrGlobalStateSize, dedupInterval, *streamAggrGlobalDropInputLabels, "dedup-global")
 	}
 }
 
@@ -161,7 +166,7 @@ func (rwctx *remoteWriteCtx) initStreamAggrConfig() {
 		if streamAggrDropInputLabels.GetOptionalArg(idx) != "" {
 			dropLabels = strings.Split(streamAggrDropInputLabels.GetOptionalArg(idx), "^^")
 		}
-		rwctx.deduplicator = streamaggr.NewDeduplicator(rwctx.pushInternalTrackDropped, dedupInterval, dropLabels, alias)
+		rwctx.deduplicator = streamaggr.NewDeduplicator(rwctx.pushInternalTrackDropped, *streamAggrGlobalStateSize, dedupInterval, dropLabels, alias)
 	}
 }
 
@@ -207,6 +212,7 @@ func newStreamAggrConfigGlobal() (*streamaggr.Aggregators, error) {
 		IgnoreOldSamples:     *streamAggrGlobalIgnoreOldSamples,
 		IgnoreFirstIntervals: *streamAggrGlobalIgnoreFirstIntervals,
 		KeepInput:            *streamAggrGlobalKeepInput,
+		StateSize:            *streamAggrGlobalStateSize,
 	}
 
 	sas, err := streamaggr.LoadFromFile(path, pushToRemoteStoragesTrackDropped, opts, "global")
@@ -221,6 +227,9 @@ func (rwctx *remoteWriteCtx) newStreamAggrConfig() (*streamaggr.Aggregators, err
 }
 
 func newStreamAggrConfigPerURL(idx int, pushFunc streamaggr.PushFunc) (*streamaggr.Aggregators, error) {
+	if streamAggrStateSize.GetOptionalArg(idx) < 1 {
+		return nil, fmt.Errorf("--remoteWrite.streamAggr.stateSize should be greater than 0")
+	}
 	path := streamAggrConfig.GetOptionalArg(idx)
 	if path == "" {
 		return nil, nil
@@ -240,6 +249,7 @@ func newStreamAggrConfigPerURL(idx int, pushFunc streamaggr.PushFunc) (*streamag
 		IgnoreOldSamples:     streamAggrIgnoreOldSamples.GetOptionalArg(idx),
 		IgnoreFirstIntervals: streamAggrIgnoreFirstIntervals.GetOptionalArg(idx),
 		KeepInput:            streamAggrKeepInput.GetOptionalArg(idx),
+		StateSize:            streamAggrStateSize.GetOptionalArg(idx),
 	}
 
 	sas, err := streamaggr.LoadFromFile(path, pushFunc, opts, alias)

app/vminsert/common/streamaggr.go

@@ -36,6 +36,7 @@ var (
 		"See https://docs.victoriametrics.com/stream-aggregation/#ignoring-old-samples")
 	streamAggrIgnoreFirstIntervals = flag.Int("streamAggr.ignoreFirstIntervals", 0, "Number of aggregation intervals to skip after the start. Increase this value if you observe incorrect aggregation results after restarts. It could be caused by receiving unordered delayed data from clients pushing data into the database. "+
 		"See https://docs.victoriametrics.com/stream-aggregation/#ignore-aggregation-intervals-on-start")
+	streamAggrStateSize = flag.Int("streamAggr.stateSize", 1, "Number of aggregation intervals")
 )
 
 var (
@@ -62,6 +63,7 @@ func CheckStreamAggrConfig() error {
 		DropInputLabels:      *streamAggrDropInputLabels,
 		IgnoreOldSamples:     *streamAggrIgnoreOldSamples,
 		IgnoreFirstIntervals: *streamAggrIgnoreFirstIntervals,
+		StateSize:            *streamAggrStateSize,
 	}
 	sas, err := streamaggr.LoadFromFile(*streamAggrConfig, pushNoop, opts, "global")
 	if err != nil {
@@ -78,7 +80,7 @@ func InitStreamAggr() {
 	saCfgReloaderStopCh = make(chan struct{})
 	if *streamAggrConfig == "" {
 		if *streamAggrDedupInterval > 0 {
-			deduplicator = streamaggr.NewDeduplicator(pushAggregateSeries, *streamAggrDedupInterval, *streamAggrDropInputLabels, "global")
+			deduplicator = streamaggr.NewDeduplicator(pushAggregateSeries, *streamAggrStateSize, *streamAggrDedupInterval, *streamAggrDropInputLabels, "global")
 		}
 		return
 	}

lib/streamaggr/avg.go

@@ -1,90 +1,20 @@
 package streamaggr
 
-import (
+type avgAggrValue struct {
-	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-)
-
-// avgAggrState calculates output=avg, e.g. the average value over input samples.
-type avgAggrState struct {
-	m sync.Map
-}
-
-type avgState struct {
 	sum   float64
 	count float64
 }
 
-type avgStateValue struct {
+func (sv *avgAggrValue) pushSample(ctx *pushSampleCtx) {
-	mu             sync.Mutex
+	sv.sum += ctx.sample.value
-	state          [aggrStateSize]avgState
+	sv.count++
-	deleted        bool
-	deleteDeadline int64
 }
 
-func newAvgAggrState() *avgAggrState {
+func (sv *avgAggrValue) flush(ctx *flushCtx, key string) {
-	return &avgAggrState{}
+	if sv.count > 0 {
-}
+		avg := sv.sum / sv.count
-
-func (as *avgAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &avgStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*avgStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			sv.state[idx].sum += s.value
-			sv.state[idx].count++
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
-	}
-}
-
-func (as *avgAggrState) flushState(ctx *flushCtx) {
-	m := &as.m
-	m.Range(func(k, v any) bool {
-		// Atomically delete the entry from the map, so new entry is created for the next flush.
-		sv := v.(*avgStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = avgState{}
-		sv.mu.Unlock()
-		if state.count > 0 {
-			key := k.(string)
-			avg := state.sum/state.count
 		ctx.appendSeries(key, "avg", avg)
+		sv.sum = 0
+		sv.count = 0
 	}
-		return true
-	})
 }

lib/streamaggr/count_samples.go

@@ -1,82 +1,14 @@
 package streamaggr
 
-import (
+type countSamplesAggrValue struct {
-	"sync"
+	count uint64
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-)
-
-// countSamplesAggrState calculates output=count_samples, e.g. the count of input samples.
-type countSamplesAggrState struct {
-	m sync.Map
 }
 
-type countSamplesStateValue struct {
+func (av *countSamplesAggrValue) pushSample(_ *pushSampleCtx) {
-	mu             sync.Mutex
+	av.count++
-	state          [aggrStateSize]uint64
-	deleted        bool
-	deleteDeadline int64
 }
 
-func newCountSamplesAggrState() *countSamplesAggrState {
+func (av *countSamplesAggrValue) flush(ctx *flushCtx, key string) {
-	return &countSamplesAggrState{}
+	ctx.appendSeries(key, "count_samples", float64(av.count))
-}
+	av.count = 0
-
-func (as *countSamplesAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &countSamplesStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*countSamplesStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			sv.state[idx]++
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
-	}
-}
-
-func (as *countSamplesAggrState) flushState(ctx *flushCtx) {
-	m := &as.m
-	m.Range(func(k, v any) bool {
-		sv := v.(*countSamplesStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = 0
-		sv.mu.Unlock()
-		if state > 0 {
-			key := k.(string)
-			ctx.appendSeries(key, "count_samples", float64(state))
-		}
-		return true
-	})
 }

lib/streamaggr/count_series.go

@@ -1,93 +1,33 @@
 package streamaggr
 
 import (
-	"sync"
-
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/cespare/xxhash/v2"
 )
 
-// countSeriesAggrState calculates output=count_series, e.g. the number of unique series.
+func countSeriesInitFn(values []aggrValue) []aggrValue {
-type countSeriesAggrState struct {
+	for i := range values {
-	m sync.Map
+		values[i] = &countSeriesAggrValue{
+			samples: make(map[uint64]struct{}),
+		}
+	}
+	return values
 }
 
-type countSeriesStateValue struct {
+type countSeriesAggrValue struct {
-	mu             sync.Mutex
+	samples map[uint64]struct{}
-	state          [aggrStateSize]map[uint64]struct{}
-	deleted        bool
-	deleteDeadline int64
 }
 
-func newCountSeriesAggrState() *countSeriesAggrState {
+func (av *countSeriesAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &countSeriesAggrState{}
-}
-
-func (as *countSeriesAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		inputKey, outputKey := getInputOutputKey(s.key)
-
 	// Count unique hashes over the inputKeys instead of unique inputKey values.
 	// This reduces memory usage at the cost of possible hash collisions for distinct inputKey values.
-		h := xxhash.Sum64(bytesutil.ToUnsafeBytes(inputKey))
+	h := xxhash.Sum64(bytesutil.ToUnsafeBytes(ctx.inputKey))
-
+	if _, ok := av.samples[h]; !ok {
-	again:
+		av.samples[h] = struct{}{}
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			csv := &countSeriesStateValue{}
-			for ic := range csv.state {
-				csv.state[ic] = make(map[uint64]struct{})
-			}
-			v = csv
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Update the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*countSeriesStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			if _, ok := sv.state[idx][h]; !ok {
-				sv.state[idx][h] = struct{}{}
-			}
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
 	}
 }
 
-func (as *countSeriesAggrState) flushState(ctx *flushCtx) {
+func (av *countSeriesAggrValue) flush(ctx *flushCtx, key string) {
-	m := &as.m
+	ctx.appendSeries(key, "count_series", float64(len(av.samples)))
-	m.Range(func(k, v any) bool {
+	clear(av.samples)
-		sv := v.(*countSeriesStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		state := len(sv.state[ctx.idx])
-		sv.state[ctx.idx] = make(map[uint64]struct{})
-		sv.mu.Unlock()
-		if state > 0 {
-			key := k.(string)
-			ctx.appendSeries(key, "count_series", float64(state))
-		}
-		return true
-	})
 }

lib/streamaggr/dedup.go

@@ -15,7 +15,7 @@ const dedupAggrShardsCount = 128
 
 type dedupAggr struct {
 	shards    []dedupAggrShard
-	currentIdx atomic.Int32
+	stateSize int
 }
 
 type dedupAggrShard struct {
@@ -34,8 +34,8 @@ type dedupAggrState struct {
 }
 
 type dedupAggrShardNopad struct {
-	mu    sync.RWMutex
+	mu    sync.Mutex
-	state [aggrStateSize]*dedupAggrState
+	state []*dedupAggrState
 }
 
 type dedupAggrSample struct {
@@ -43,19 +43,21 @@ type dedupAggrSample struct {
 	timestamp int64
 }
 
-func newDedupAggr() *dedupAggr {
+func newDedupAggr(stateSize int) *dedupAggr {
 	shards := make([]dedupAggrShard, dedupAggrShardsCount)
 	return &dedupAggr{
 		shards:    shards,
+		stateSize: stateSize,
 	}
 }
 
 func (da *dedupAggr) sizeBytes() uint64 {
 	n := uint64(unsafe.Sizeof(*da))
-	currentIdx := da.currentIdx.Load()
 	for i := range da.shards {
-		if da.shards[i].state[currentIdx] != nil {
+		for _, state := range da.shards[i].state {
-			n += da.shards[i].state[currentIdx].sizeBytes.Load()
+			if state != nil {
+				n += state.sizeBytes.Load()
+			}
 		}
 	}
 	return n
@@ -63,19 +65,20 @@ func (da *dedupAggr) sizeBytes() uint64 {
 
 func (da *dedupAggr) itemsCount() uint64 {
 	n := uint64(0)
-	currentIdx := da.currentIdx.Load()
 	for i := range da.shards {
-		if da.shards[i].state[currentIdx] != nil {
+		for _, state := range da.shards[i].state {
-			n += da.shards[i].state[currentIdx].itemsCount.Load()
+			if state != nil {
+				n += state.itemsCount.Load()
+			}
 		}
 	}
 	return n
 }
 
-func (da *dedupAggr) pushSamples(samples []pushSample, _ int64, dedupIdx int) {
+func (da *dedupAggr) pushSamples(data *pushCtxData) {
 	pss := getPerShardSamples()
 	shards := pss.shards
-	for _, sample := range samples {
+	for _, sample := range data.samples {
 		h := xxhash.Sum64(bytesutil.ToUnsafeBytes(sample.key))
 		idx := h % uint64(len(shards))
 		shards[idx] = append(shards[idx], sample)
@@ -84,17 +87,21 @@ func (da *dedupAggr) pushSamples(samples []pushSample, _ int64, dedupIdx int) {
 		if len(shardSamples) == 0 {
 			continue
 		}
-		da.shards[i].pushSamples(shardSamples, dedupIdx)
+		da.shards[i].pushSamples(shardSamples, da.stateSize, data.idx)
 	}
 	putPerShardSamples(pss)
 }
 
-func getDedupFlushCtx() *dedupFlushCtx {
+func getDedupFlushCtx(deleteDeadline int64, dedupIdx, flushIdx int) *dedupFlushCtx {
 	v := dedupFlushCtxPool.Get()
 	if v == nil {
-		return &dedupFlushCtx{}
+		v = &dedupFlushCtx{}
 	}
-	return v.(*dedupFlushCtx)
+	ctx := v.(*dedupFlushCtx)
+	ctx.deleteDeadline = deleteDeadline
+	ctx.dedupIdx = dedupIdx
+	ctx.flushIdx = flushIdx
+	return ctx
 }
 
 func putDedupFlushCtx(ctx *dedupFlushCtx) {
@@ -106,11 +113,25 @@ var dedupFlushCtxPool sync.Pool
 
 type dedupFlushCtx struct {
 	samples        []pushSample
+	deleteDeadline int64
+	dedupIdx       int
+	flushIdx       int
+}
+
+func (ctx *dedupFlushCtx) getPushCtxData(samples []pushSample) *pushCtxData {
+	return &pushCtxData{
+		samples:        samples,
+		deleteDeadline: ctx.deleteDeadline,
+		idx:            ctx.flushIdx,
+	}
 }
 
 func (ctx *dedupFlushCtx) reset() {
 	clear(ctx.samples)
 	ctx.samples = ctx.samples[:0]
+	ctx.deleteDeadline = 0
+	ctx.dedupIdx = 0
+	ctx.flushIdx = 0
 }
 
 func (da *dedupAggr) flush(f aggrPushFunc, deleteDeadline int64, dedupIdx, flushIdx int) {
@@ -123,13 +144,11 @@ func (da *dedupAggr) flush(f aggrPushFunc, deleteDeadline int64, dedupIdx, flush
 				<-flushConcurrencyCh
 				wg.Done()
 			}()
-
+			ctx := getDedupFlushCtx(deleteDeadline, dedupIdx, flushIdx)
-			ctx := getDedupFlushCtx()
+			shard.flush(ctx, f)
-			shard.flush(ctx, f, deleteDeadline, dedupIdx, flushIdx)
 			putDedupFlushCtx(ctx)
 		}(&da.shards[i])
 	}
-	da.currentIdx.Store((da.currentIdx.Load() + 1) % aggrStateSize)
 	wg.Wait()
 }
 
@@ -164,10 +183,13 @@ func putPerShardSamples(pss *perShardSamples) {
 
 var perShardSamplesPool sync.Pool
 
-func (das *dedupAggrShard) pushSamples(samples []pushSample, dedupIdx int) {
+func (das *dedupAggrShard) pushSamples(samples []pushSample, stateSize, dedupIdx int) {
 	das.mu.Lock()
 	defer das.mu.Unlock()
 
+	if len(das.state) == 0 {
+		das.state = make([]*dedupAggrState, stateSize)
+	}
 	state := das.state[dedupIdx]
 	if state == nil {
 		state = &dedupAggrState{
@@ -200,17 +222,20 @@ func (das *dedupAggrShard) pushSamples(samples []pushSample, dedupIdx int) {
 	das.state[dedupIdx].samplesBuf = samplesBuf
 }
 
-func (das *dedupAggrShard) flush(ctx *dedupFlushCtx, f aggrPushFunc, deleteDeadline int64, dedupIdx, flushIdx int) {
+func (das *dedupAggrShard) flush(ctx *dedupFlushCtx, f aggrPushFunc) {
 	das.mu.Lock()
 
 	var m map[string]*dedupAggrSample
-	state := das.state[dedupIdx]
+	if len(das.state) == 0 {
+		return
+	}
+	state := das.state[ctx.dedupIdx]
 	if state != nil && len(state.m) > 0 {
 		m = state.m
-		das.state[dedupIdx].m = make(map[string]*dedupAggrSample, len(state.m))
+		das.state[ctx.dedupIdx].m = make(map[string]*dedupAggrSample, len(state.m))
-		das.state[dedupIdx].samplesBuf = make([]dedupAggrSample, 0, len(das.state[dedupIdx].samplesBuf))
+		das.state[ctx.dedupIdx].samplesBuf = make([]dedupAggrSample, 0, len(das.state[ctx.dedupIdx].samplesBuf))
-		das.state[dedupIdx].sizeBytes.Store(0)
+		das.state[ctx.dedupIdx].sizeBytes.Store(0)
-		das.state[dedupIdx].itemsCount.Store(0)
+		das.state[ctx.dedupIdx].itemsCount.Store(0)
 	}
 
 	das.mu.Unlock()
@@ -229,11 +254,13 @@ func (das *dedupAggrShard) flush(ctx *dedupFlushCtx, f aggrPushFunc, deleteDeadl
 
 		// Limit the number of samples per each flush in order to limit memory usage.
 		if len(dstSamples) >= 10_000 {
-			f(dstSamples, deleteDeadline, flushIdx)
+			data := ctx.getPushCtxData(dstSamples)
+			f(data)
 			clear(dstSamples)
 			dstSamples = dstSamples[:0]
 		}
 	}
-	f(dstSamples, deleteDeadline, flushIdx)
+	data := ctx.getPushCtxData(dstSamples)
+	f(data)
 	ctx.samples = dstSamples
 }

lib/streamaggr/dedup_test.go

@@ -9,7 +9,7 @@ import (
 )
 
 func TestDedupAggrSerial(t *testing.T) {
-	da := newDedupAggr()
+	da := newDedupAggr(2)
 
 	const seriesCount = 100_000
 	expectedSamplesMap := make(map[string]pushSample)
@@ -21,7 +21,10 @@ func TestDedupAggrSerial(t *testing.T) {
 			sample.value = float64(i + j)
 			expectedSamplesMap[sample.key] = *sample
 		}
-		da.pushSamples(samples, 0, 0)
+		data := &pushCtxData{
+			samples: samples,
+		}
+		da.pushSamples(data)
 	}
 
 	if n := da.sizeBytes(); n > 5_000_000 {
@@ -33,9 +36,9 @@ func TestDedupAggrSerial(t *testing.T) {
 
 	flushedSamplesMap := make(map[string]pushSample)
 	var mu sync.Mutex
-	flushSamples := func(samples []pushSample, _ int64, _ int) {
+	flushSamples := func(ctx *pushCtxData) {
 		mu.Lock()
-		for _, sample := range samples {
+		for _, sample := range ctx.samples {
 			flushedSamplesMap[sample.key] = sample
 		}
 		mu.Unlock()
@@ -59,7 +62,7 @@ func TestDedupAggrSerial(t *testing.T) {
 func TestDedupAggrConcurrent(_ *testing.T) {
 	const concurrency = 5
 	const seriesCount = 10_000
-	da := newDedupAggr()
+	da := newDedupAggr(2)
 
 	var wg sync.WaitGroup
 	for i := 0; i < concurrency; i++ {
@@ -67,13 +70,15 @@ func TestDedupAggrConcurrent(_ *testing.T) {
 		go func() {
 			defer wg.Done()
 			for i := 0; i < 10; i++ {
-				samples := make([]pushSample, seriesCount)
+				data := &pushCtxData{
-				for j := range samples {
+					samples: make([]pushSample, seriesCount),
-					sample := &samples[j]
+				}
+				for j := range data.samples {
+					sample := &data.samples[j]
 					sample.key = fmt.Sprintf("key_%d", j)
 					sample.value = float64(i + j)
 				}
-				da.pushSamples(samples, 0, 0)
+				da.pushSamples(data)
 			}
 		}()
 	}

lib/streamaggr/dedup_timing_test.go

@@ -19,7 +19,7 @@ func BenchmarkDedupAggr(b *testing.B) {
 func benchmarkDedupAggr(b *testing.B, samplesPerPush int) {
 	const loops = 2
 	benchSamples := newBenchSamples(samplesPerPush)
-	da := newDedupAggr()
+	da := newDedupAggr(2)
 
 	b.ResetTimer()
 	b.ReportAllocs()
@@ -27,7 +27,9 @@ func benchmarkDedupAggr(b *testing.B, samplesPerPush int) {
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
 			for i := 0; i < loops; i++ {
-				da.pushSamples(benchSamples, 0, 0)
+				da.pushSamples(&pushCtxData{
+					samples: benchSamples,
+				})
 			}
 		}
 	})

lib/streamaggr/deduplicator.go

@@ -10,6 +10,7 @@ import (
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/promutils"
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/slicesutil"
 	"github.com/VictoriaMetrics/metrics"
 )
 
@@ -17,6 +18,7 @@ import (
 type Deduplicator struct {
 	da *dedupAggr
 
+	stateSize     int
 	dropLabels    []string
 	dedupInterval int64
 
@@ -39,11 +41,12 @@ type Deduplicator struct {
 // alias is url label used in metrics exposed by the returned Deduplicator.
 //
 // MustStop must be called on the returned deduplicator in order to free up occupied resources.
-func NewDeduplicator(pushFunc PushFunc, dedupInterval time.Duration, dropLabels []string, alias string) *Deduplicator {
+func NewDeduplicator(pushFunc PushFunc, stateSize int, dedupInterval time.Duration, dropLabels []string, alias string) *Deduplicator {
 	d := &Deduplicator{
-		da:            newDedupAggr(),
+		da:            newDedupAggr(stateSize),
 		dropLabels:    dropLabels,
 		dedupInterval: dedupInterval.Milliseconds(),
+		stateSize:     stateSize,
 
 		stopCh: make(chan struct{}),
 		ms:     metrics.NewSet(),
@@ -85,13 +88,13 @@ func (d *Deduplicator) MustStop() {
 
 // Push pushes tss to d.
 func (d *Deduplicator) Push(tss []prompbmarshal.TimeSeries) {
-	ctx := getDeduplicatorPushCtx()
+	ctx := getDeduplicatorPushCtx(d.stateSize)
 	pss := ctx.pss
 	labels := &ctx.labels
 	buf := ctx.buf
 
 	dropLabels := d.dropLabels
-	aggrIntervals := int64(aggrStateSize)
+	aggrIntervals := int64(d.stateSize)
 	for _, ts := range tss {
 		if len(dropLabels) > 0 {
 			labels.Labels = dropSeriesLabels(labels.Labels[:0], ts.Labels, dropLabels)
@@ -117,8 +120,11 @@ func (d *Deduplicator) Push(tss []prompbmarshal.TimeSeries) {
 		}
 	}
 
+	data := &pushCtxData{}
 	for idx, ps := range pss {
-		d.da.pushSamples(ps, 0, idx)
+		data.idx = idx
+		data.samples = ps
+		d.da.pushSamples(data)
 	}
 
 	ctx.pss = pss
@@ -146,20 +152,21 @@ func (d *Deduplicator) runFlusher(pushFunc PushFunc, dedupInterval time.Duration
 			flushTime := t.Truncate(dedupInterval).Add(dedupInterval)
 			flushTimestamp := flushTime.UnixMilli()
 			flushIntervals := int(flushTimestamp / int64(dedupInterval/time.Millisecond))
-			flushIdx := flushIntervals % aggrStateSize
+			flushIdx := flushIntervals % d.stateSize
-			d.flush(pushFunc, dedupInterval, flushTime, flushIdx)
+			d.flush(pushFunc, dedupInterval, flushTimestamp, flushIdx)
 		}
 	}
 }
 
-func (d *Deduplicator) flush(pushFunc PushFunc, dedupInterval time.Duration, flushTime time.Time, flushIdx int) {
+func (d *Deduplicator) flush(pushFunc PushFunc, dedupInterval time.Duration, flushTimestamp int64, idx int) {
-	d.da.flush(func(pss []pushSample, _ int64, _ int) {
+	startTime := time.Now()
+	d.da.flush(func(data *pushCtxData) {
 		ctx := getDeduplicatorFlushCtx()
 
 		tss := ctx.tss
 		labels := ctx.labels
 		samples := ctx.samples
-		for _, ps := range pss {
+		for _, ps := range data.samples {
 			labelsLen := len(labels)
 			labels = decompressLabels(labels, ps.key)
 
@@ -180,9 +187,9 @@ func (d *Deduplicator) flush(pushFunc PushFunc, dedupInterval time.Duration, flu
 		ctx.labels = labels
 		ctx.samples = samples
 		putDeduplicatorFlushCtx(ctx)
-	}, flushTime.UnixMilli(), flushIdx, flushIdx)
+	}, flushTimestamp, idx, idx)
 
-	duration := time.Since(flushTime)
+	duration := time.Since(startTime)
 	d.dedupFlushDuration.Update(duration.Seconds())
 	if duration > dedupInterval {
 		d.dedupFlushTimeouts.Inc()
@@ -193,7 +200,7 @@ func (d *Deduplicator) flush(pushFunc PushFunc, dedupInterval time.Duration, flu
 }
 
 type deduplicatorPushCtx struct {
-	pss    [aggrStateSize][]pushSample
+	pss    [][]pushSample
 	labels promutils.Labels
 	buf    []byte
 }
@@ -208,12 +215,18 @@ func (ctx *deduplicatorPushCtx) reset() {
 	ctx.buf = ctx.buf[:0]
 }
 
-func getDeduplicatorPushCtx() *deduplicatorPushCtx {
+func getDeduplicatorPushCtx(stateSize int) *deduplicatorPushCtx {
 	v := deduplicatorPushCtxPool.Get()
 	if v == nil {
-		return &deduplicatorPushCtx{}
+		return &deduplicatorPushCtx{
+			pss: make([][]pushSample, stateSize),
 		}
-	return v.(*deduplicatorPushCtx)
+	}
+	ctx := v.(*deduplicatorPushCtx)
+	if len(ctx.pss) < stateSize {
+		ctx.pss = slicesutil.SetLength(ctx.pss, stateSize)
+	}
+	return ctx
 }
 
 func putDeduplicatorPushCtx(ctx *deduplicatorPushCtx) {

lib/streamaggr/deduplicator_test.go

@@ -31,16 +31,17 @@ baz_aaa_aaa_fdd{instance="x",job="aaa",pod="sdfd-dfdfdfs",node="aosijjewrerfd",n
 `, offsetMsecs)
 
 	dedupInterval := time.Hour
-	d := NewDeduplicator(pushFunc, dedupInterval, []string{"node", "instance"}, "global")
+	d := NewDeduplicator(pushFunc, 2, dedupInterval, []string{"node", "instance"}, "global")
 	for i := 0; i < 10; i++ {
 		d.Push(tss)
 	}
 
 	flushTime := time.Now()
 	flushIntervals := flushTime.UnixMilli()/dedupInterval.Milliseconds() + 1
+	aggrStateSize := 2
 	idx := int(flushIntervals % int64(aggrStateSize))
 
-	d.flush(pushFunc, time.Hour, time.Now(), idx)
+	d.flush(pushFunc, time.Hour, time.Now().UnixMilli(), idx)
 	d.MustStop()
 
 	result := timeSeriessToString(tssResult)

lib/streamaggr/deduplicator_timing_test.go

@@ -9,7 +9,7 @@ import (
 
 func BenchmarkDeduplicatorPush(b *testing.B) {
 	pushFunc := func(_ []prompbmarshal.TimeSeries) {}
-	d := NewDeduplicator(pushFunc, time.Hour, nil, "global")
+	d := NewDeduplicator(pushFunc, 2, time.Hour, nil, "global")
 
 	b.ReportAllocs()
 	b.SetBytes(int64(len(benchSeries)))

lib/streamaggr/histogram_bucket.go

@@ -1,85 +1,24 @@
 package streamaggr
 
 import (
-	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/VictoriaMetrics/metrics"
 )
 
-// histogramBucketAggrState calculates output=histogram_bucket, e.g. VictoriaMetrics histogram over input samples.
+// histogramBucketAggrValue calculates output=histogram_bucket, e.g. VictoriaMetrics histogram over input samples.
-type histogramBucketAggrState struct {
+type histogramBucketAggrValue struct {
-	m sync.Map
+	h     metrics.Histogram
+	state metrics.Histogram
 }
 
-type histogramBucketStateValue struct {
+func (sv *histogramBucketAggrValue) pushSample(ctx *pushSampleCtx) {
-	mu             sync.Mutex
+	sv.h.Update(ctx.sample.value)
-	state          [aggrStateSize]metrics.Histogram
-	total          metrics.Histogram
-	deleted        bool
-	deleteDeadline int64
 }
 
-func newHistogramBucketAggrState() *histogramBucketAggrState {
+func (sv *histogramBucketAggrValue) flush(ctx *flushCtx, key string) {
-	return &histogramBucketAggrState{}
+	total := &sv.state
-}
+	total.Merge(&sv.h)
-
-func (as *histogramBucketAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &histogramBucketStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*histogramBucketStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			sv.state[idx].Update(s.value)
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
-	}
-}
-
-func (as *histogramBucketAggrState) flushState(ctx *flushCtx) {
-	m := &as.m
-	m.Range(func(k, v any) bool {
-		sv := v.(*histogramBucketStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		sv.total.Merge(&sv.state[ctx.idx])
-		total := &sv.total
-		sv.state[ctx.idx] = metrics.Histogram{}
-		sv.mu.Unlock()
-		key := k.(string)
 	total.VisitNonZeroBuckets(func(vmrange string, count uint64) {
 		ctx.appendSeriesWithExtraLabel(key, "histogram_bucket", float64(count), "vmrange", vmrange)
 	})
-		return true
+	total.Reset()
-	})
 }

lib/streamaggr/last.go

@@ -1,90 +1,20 @@
 package streamaggr
 
-import (
+type lastAggrValue struct {
-	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-)
-
-// lastAggrState calculates output=last, e.g. the last value over input samples.
-type lastAggrState struct {
-	m sync.Map
-}
-
-type lastStateValue struct {
-	mu             sync.Mutex
-	state          [aggrStateSize]lastState
-	deleted        bool
-	deleteDeadline int64
-}
-
-type lastState struct {
 	last      float64
 	timestamp int64
 }
 
-func newLastAggrState() *lastAggrState {
+func (av *lastAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &lastAggrState{}
+	if ctx.sample.timestamp >= av.timestamp {
-}
+		av.last = ctx.sample.value
-
+		av.timestamp = ctx.sample.timestamp
-func (as *lastAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &lastStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Update the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*lastStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			if s.timestamp >= sv.state[idx].timestamp {
-				sv.state[idx].last = s.value
-				sv.state[idx].timestamp = s.timestamp
-			}
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
 	}
 }
 
-func (as *lastAggrState) flushState(ctx *flushCtx) {
+func (av *lastAggrValue) flush(ctx *flushCtx, key string) {
-	m := &as.m
+	if av.timestamp > 0 {
-	m.Range(func(k, v any) bool {
+		ctx.appendSeries(key, "last", av.last)
-		sv := v.(*lastStateValue)
+		av.timestamp = 0
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
 	}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = lastState{}
-		sv.mu.Unlock()
-		if state.timestamp > 0 {
-			key := k.(string)
-			ctx.appendSeries(key, "last", state.last)
-		}
-		return true
-	})
 }

lib/streamaggr/max.go

@@ -1,93 +1,23 @@
 package streamaggr
 
-import (
+type maxAggrValue struct {
-	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-)
-
-// maxAggrState calculates output=max, e.g. the maximum value over input samples.
-type maxAggrState struct {
-	m sync.Map
-}
-
-type maxStateValue struct {
-	mu             sync.Mutex
-	state          [aggrStateSize]maxState
-	deleted        bool
-	deleteDeadline int64
-}
-
-type maxState struct {
 	max     float64
-	exists bool
+	defined bool
 }
 
-func newMaxAggrState() *maxAggrState {
+func (av *maxAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &maxAggrState{}
+	if ctx.sample.value > av.max || !av.defined {
-}
+		av.max = ctx.sample.value
-
-func (as *maxAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &maxStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*maxStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			state := &sv.state[idx]
-			if !state.exists {
-				state.max = s.value
-				state.exists = true
-			} else if s.value > state.max {
-				state.max = s.value
-			}
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
 	}
+	if !av.defined {
+		av.defined = true
 	}
 }
 
-func (as *maxAggrState) flushState(ctx *flushCtx) {
+func (av *maxAggrValue) flush(ctx *flushCtx, key string) {
-	m := &as.m
+	if av.defined {
-	m.Range(func(k, v any) bool {
+		ctx.appendSeries(key, "max", av.max)
-		sv := v.(*maxStateValue)
+		av.max = 0
-		sv.mu.Lock()
+		av.defined = false
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
 	}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = maxState{}
-		sv.mu.Unlock()
-		if state.exists {
-			key := k.(string)
-			ctx.appendSeries(key, "max", state.max)
-		}
-		return true
-	})
 }

lib/streamaggr/min.go

@@ -1,93 +1,23 @@
 package streamaggr
 
-import (
+type minAggrValue struct {
-	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-)
-
-// minAggrState calculates output=min, e.g. the minimum value over input samples.
-type minAggrState struct {
-	m sync.Map
-}
-
-type minStateValue struct {
-	mu             sync.Mutex
-	state          [aggrStateSize]minState
-	deleted        bool
-	deleteDeadline int64
-}
-
-type minState struct {
 	min     float64
-	exists bool
+	defined bool
 }
 
-func newMinAggrState() *minAggrState {
+func (av *minAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &minAggrState{}
+	if ctx.sample.value < av.min || !av.defined {
-}
+		av.min = ctx.sample.value
-
-func (as *minAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &minStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*minStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			state := &sv.state[idx]
-			if !state.exists {
-				state.min = s.value
-				state.exists = true
-			} else if s.value < state.min {
-				state.min = s.value
-			}
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
 	}
+	if !av.defined {
+		av.defined = true
 	}
 }
 
-func (as *minAggrState) flushState(ctx *flushCtx) {
+func (av *minAggrValue) flush(ctx *flushCtx, key string) {
-	m := &as.m
+	if av.defined {
-	m.Range(func(k, v any) bool {
+		ctx.appendSeries(key, "min", av.min)
-		sv := v.(*minStateValue)
+		av.defined = false
-		sv.mu.Lock()
+		av.min = 0
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
 	}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = minState{}
-		sv.mu.Unlock()
-		if state.exists {
-			key := k.(string)
-			ctx.appendSeries(key, "min", state.min)
-		}
-		return true
-	})
 }

lib/streamaggr/output.go

@@ -0,0 +1,129 @@
+package streamaggr
+
+import (
+	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
+	"github.com/VictoriaMetrics/metrics"
+	"sync"
+)
+
+type pushSampleCtx struct {
+	stateSize      int
+	deleteDeadline int64
+	sample         *pushSample
+	idx            int
+	inputKey       string
+}
+
+type aggrValuesFn func(*pushSampleCtx) []aggrValue
+
+type aggrValuesInitFn func([]aggrValue) []aggrValue
+
+func newAggrValues[V any, VP aggrValuePtr[V]](initFn aggrValuesInitFn) aggrValuesFn {
+	return func(ctx *pushSampleCtx) []aggrValue {
+		output := make([]aggrValue, ctx.stateSize)
+		if initFn != nil {
+			return initFn(output)
+		}
+		for i := range output {
+			var v VP = new(V)
+			output[i] = v
+		}
+		return output
+	}
+}
+
+type aggrOutputs struct {
+	m             sync.Map
+	stateSize     int
+	initFns       []aggrValuesFn
+	outputSamples *metrics.Counter
+}
+
+func (ao *aggrOutputs) pushSamples(data *pushCtxData) {
+	ctx := &pushSampleCtx{
+		stateSize:      ao.stateSize,
+		deleteDeadline: data.deleteDeadline,
+		idx:            data.idx,
+	}
+	var outputKey string
+	for i := range data.samples {
+		ctx.sample = &data.samples[i]
+		ctx.inputKey, outputKey = getInputOutputKey(ctx.sample.key)
+
+	again:
+		v, ok := ao.m.Load(outputKey)
+		if !ok {
+			// The entry is missing in the map. Try creating it.
+			nv := &aggrValues{
+				values: make([][]aggrValue, len(ao.initFns)),
+			}
+			for i, initFn := range ao.initFns {
+				nv.values[i] = initFn(ctx)
+			}
+			v = nv
+			outputKey = bytesutil.InternString(outputKey)
+			vNew, loaded := ao.m.LoadOrStore(outputKey, v)
+			if loaded {
+				// Use the entry created by a concurrent goroutine.
+				v = vNew
+			}
+		}
+		av := v.(*aggrValues)
+		av.mu.Lock()
+		deleted := av.deleted
+		if !deleted {
+			for i := range av.values {
+				av.values[i][data.idx].pushSample(ctx)
+			}
+			av.deleteDeadline = data.deleteDeadline
+		}
+		av.mu.Unlock()
+		if deleted {
+			// The entry has been deleted by the concurrent call to flush
+			// Try obtaining and updating the entry again.
+			goto again
+		}
+	}
+}
+
+func (ao *aggrOutputs) flushState(ctx *flushCtx) {
+	m := &ao.m
+	m.Range(func(k, v any) bool {
+		// Atomically delete the entry from the map, so new entry is created for the next flush.
+		av := v.(*aggrValues)
+		av.mu.Lock()
+
+		// check for stale entries
+		deleted := ctx.flushTimestamp > av.deleteDeadline
+		if deleted {
+			// Mark the current entry as deleted
+			av.deleted = deleted
+			av.mu.Unlock()
+			m.Delete(k)
+			return true
+		}
+		key := k.(string)
+		for _, ov := range av.values {
+			ov[ctx.idx].flush(ctx, key)
+		}
+		av.mu.Unlock()
+		return true
+	})
+}
+
+type aggrValues struct {
+	mu             sync.Mutex
+	values         [][]aggrValue
+	deleteDeadline int64
+	deleted        bool
+}
+
+type aggrValue interface {
+	pushSample(*pushSampleCtx)
+	flush(*flushCtx, string)
+}
+
+type aggrValuePtr[V any] interface {
+	*V
+	aggrValue
+}

lib/streamaggr/quantiles.go

@@ -1,102 +1,59 @@
 package streamaggr
 
 import (
-	"strconv"
-	"sync"
-
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 	"github.com/valyala/histogram"
+	"strconv"
 )
 
-// quantilesAggrState calculates output=quantiles, e.g. the given quantiles over the input samples.
+func quantilesInitFn(stateSize int, phis []float64) aggrValuesInitFn {
-type quantilesAggrState struct {
+	states := make([]*quantilesAggrState, stateSize)
-	m    sync.Map
+	return func(values []aggrValue) []aggrValue {
-	phis []float64
+		for i := range values {
-}
+			state := states[i]
-
+			if state == nil {
-type quantilesStateValue struct {
+				state = &quantilesAggrState{
-	mu             sync.Mutex
-	state          [aggrStateSize]*histogram.Fast
-	deleted        bool
-	deleteDeadline int64
-}
-
-func newQuantilesAggrState(phis []float64) *quantilesAggrState {
-	return &quantilesAggrState{
 					phis: phis,
 				}
-}
+				states[i] = state
-
+			}
-func (as *quantilesAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
+			values[i] = &quantilesAggrValue{
-	for i := range samples {
+				state: state,
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &quantilesStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
 			}
 		}
-		sv := v.(*quantilesStateValue)
+		return values
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			if sv.state[idx] == nil {
-				sv.state[idx] = histogram.GetFast()
-			}
-			sv.state[idx].Update(s.value)
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
 	}
 }
 
-func (as *quantilesAggrState) flushState(ctx *flushCtx) {
+type quantilesAggrState struct {
-	m := &as.m
+	phis      []float64
-	phis := as.phis
+	quantiles []float64
-	var quantiles []float64
+	b         []byte
-	var b []byte
+}
-	m.Range(func(k, v any) bool {
-		sv := v.(*quantilesStateValue)
-		sv.mu.Lock()
 
-		// check for stale entries
+// quantilesAggrValue calculates output=quantiles, e.g. the given quantiles over the input samples.
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
+type quantilesAggrValue struct {
-		if deleted {
+	h     *histogram.Fast
-			// Mark the current entry as deleted
+	state *quantilesAggrState
-			sv.deleted = deleted
+}
-			sv.mu.Unlock()
+
-			m.Delete(k)
+func (av *quantilesAggrValue) pushSample(ctx *pushSampleCtx) {
-			return true
+	if av.h == nil {
+		av.h = histogram.GetFast()
 	}
-		state := sv.state[ctx.idx]
+	av.h.Update(ctx.sample.value)
-		quantiles = quantiles[:0]
+}
-		if state != nil {
+
-			quantiles = state.Quantiles(quantiles[:0], phis)
+func (av *quantilesAggrValue) flush(ctx *flushCtx, key string) {
-			histogram.PutFast(state)
+	if av.h != nil {
-			state.Reset()
+		av.state.quantiles = av.h.Quantiles(av.state.quantiles[:0], av.state.phis)
 	}
-		sv.mu.Unlock()
+	histogram.PutFast(av.h)
-		if len(quantiles) > 0 {
+	if len(av.state.quantiles) > 0 {
-			key := k.(string)
+		for i, quantile := range av.state.quantiles {
-			for i, quantile := range quantiles {
+			av.state.b = strconv.AppendFloat(av.state.b[:0], av.state.phis[i], 'g', -1, 64)
-				b = strconv.AppendFloat(b[:0], phis[i], 'g', -1, 64)
+			phiStr := bytesutil.InternBytes(av.state.b)
-				phiStr := bytesutil.InternBytes(b)
 			ctx.appendSeriesWithExtraLabel(key, "quantiles", quantile, "quantile", phiStr)
 		}
 	}
-		return true
-	})
 }

lib/streamaggr/rate.go

@@ -1,176 +1,115 @@
 package streamaggr
 
 import (
-	"sync"
-
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 )
 
-// rateAggrState calculates output=rate_avg and rate_sum, e.g. the average per-second increase rate for counter metrics.
+func rateInitFn(isAvg bool) aggrValuesInitFn {
-type rateAggrState struct {
+	return func(values []aggrValue) []aggrValue {
-	m sync.Map
+		shared := &rateAggrValueShared{
+			lastValues: make(map[string]rateLastValue),
+		}
+		for i := range values {
+			values[i] = &rateAggrValue{
+				isAvg:  isAvg,
+				shared: shared,
+				state:  make(map[string]rateAggrValueState),
+			}
+		}
+		return values
+	}
+}
 
-	// isAvg is set to true if rate_avg() must be calculated instead of rate_sum().
+// rateLastValue calculates output=rate_avg and rate_sum, e.g. the average per-second increase rate for counter metrics.
+type rateLastValue struct {
+	value          float64
+	deleteDeadline int64
+
+	// prevTimestamp is the timestamp of the last registered sample in the previous aggregation interval
+	prevTimestamp int64
+}
+
+type rateAggrValueShared struct {
+	lastValues map[string]rateLastValue
+}
+
+type rateAggrValueState struct {
+	// increase stores cumulative increase for the current time series on the current aggregation interval
+	increase  float64
+	timestamp int64
+}
+
+type rateAggrValue struct {
+	shared *rateAggrValueShared
+	state  map[string]rateAggrValueState
 	isAvg  bool
 }
 
-type rateStateValue struct {
+func (av *rateAggrValue) pushSample(ctx *pushSampleCtx) {
-	mu             sync.Mutex
+	sv := av.state[ctx.inputKey]
-	state          map[string]rateState
+	inputKey := ctx.inputKey
-	deleted        bool
+	lv, ok := av.shared.lastValues[ctx.inputKey]
-	deleteDeadline int64
+	if ok {
-}
+		if ctx.sample.timestamp < sv.timestamp {
-
-type rateState struct {
-	lastValues [aggrStateSize]rateLastValueState
-	// prevTimestamp stores timestamp of the last registered value
-	// in the previous aggregation interval
-	prevTimestamp int64
-
-	// prevValue stores last registered value
-	// in the previous aggregation interval
-	prevValue      float64
-	deleteDeadline int64
-}
-
-type rateLastValueState struct {
-	firstValue float64
-	value      float64
-	timestamp  int64
-
-	// total stores cumulative difference between registered values
-        // in the aggregation interval
-        total float64
-}
-
-func newRateAggrState(isAvg bool) *rateAggrState {
-	return &rateAggrState{
-		isAvg:         isAvg,
-	}
-}
-
-func (as *rateAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		inputKey, outputKey := getInputOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			rsv := &rateStateValue{
-				state: make(map[string]rateState),
-			}
-			v = rsv
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*rateStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			state, ok := sv.state[inputKey]
-			lv := state.lastValues[idx]
-			if ok && lv.timestamp > 0 {
-				if s.timestamp < lv.timestamp {
 			// Skip out of order sample
-					sv.mu.Unlock()
+			return
-					continue
 		}
-				if state.prevTimestamp == 0 {
+		if ctx.sample.value >= lv.value {
-					state.prevTimestamp = lv.timestamp
+			sv.increase += ctx.sample.value - lv.value
-					state.prevValue = lv.value
-				}
-				if s.value >= lv.value {
-					lv.total += s.value - lv.value
 		} else {
 			// counter reset
-					lv.total += s.value
+			sv.increase += ctx.sample.value
 		}
-			} else if state.prevTimestamp > 0 {
+	} else {
-				lv.firstValue = s.value
+		lv.prevTimestamp = ctx.sample.timestamp
 	}
-			lv.value = s.value
+	lv.value = ctx.sample.value
-			lv.timestamp = s.timestamp
+	lv.deleteDeadline = ctx.deleteDeadline
-			state.lastValues[idx] = lv
+	sv.timestamp = ctx.sample.timestamp
-			state.deleteDeadline = deleteDeadline
 	inputKey = bytesutil.InternString(inputKey)
-			sv.state[inputKey] = state
+	av.state[inputKey] = sv
-			sv.deleteDeadline = deleteDeadline
+	av.shared.lastValues[inputKey] = lv
+}
+
+func (av *rateAggrValue) flush(ctx *flushCtx, key string) {
+	suffix := av.getSuffix()
+	rate := 0.0
+	countSeries := 0
+	lvs := av.shared.lastValues
+	for lk, lv := range lvs {
+		if ctx.flushTimestamp > lv.deleteDeadline {
+			delete(lvs, lk)
+			continue
 		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
 	}
+	for sk, sv := range av.state {
+		lv := lvs[sk]
+		if lv.prevTimestamp == 0 {
+			continue
+		}
+		d := float64(sv.timestamp-lv.prevTimestamp) / 1000
+		if d > 0 {
+			rate += sv.increase / d
+			countSeries++
+		}
+		lv.prevTimestamp = sv.timestamp
+		lvs[sk] = lv
+		delete(av.state, sk)
+	}
+	if countSeries == 0 {
+		return
+	}
+	if av.isAvg {
+		rate /= float64(countSeries)
+	}
+	if rate > 0 {
+		ctx.appendSeries(key, suffix, rate)
 	}
 }
 
-func (as *rateAggrState) getSuffix() string {
+func (av *rateAggrValue) getSuffix() string {
-        if as.isAvg {
+	if av.isAvg {
 		return "rate_avg"
 	}
 	return "rate_sum"
 }
-
-func (as *rateAggrState) flushState(ctx *flushCtx) {
-	m := &as.m
-        suffix := as.getSuffix()
-	m.Range(func(k, v any) bool {
-		sv := v.(*rateStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = true
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-
-		// Delete outdated entries in state
-		rate := 0.0
-		countSeries := 0
-		for k1, state := range sv.state {
-			if ctx.flushTimestamp > state.deleteDeadline {
-				delete(sv.state, k1)
-				continue
-			}
-			v1 := state.lastValues[ctx.idx]
-			rateInterval := v1.timestamp - state.prevTimestamp
-			if rateInterval > 0 && state.prevTimestamp > 0 {
-				if v1.firstValue >= state.prevValue {
-					v1.total += v1.firstValue - state.prevValue
-				} else {
-					v1.total += v1.firstValue
-				}
-
-				// calculate rate only if value was seen at least twice with different timestamps
-				rate += (v1.total) * 1000 / float64(rateInterval)
-				state.prevTimestamp = v1.timestamp
-				state.prevValue = v1.value
-				countSeries++
-			}
-			state.lastValues[ctx.idx] = rateLastValueState{}
-			sv.state[k1] = state
-		}
-
-		sv.mu.Unlock()
-
-		if countSeries > 0 {
-			if as.isAvg {
-				rate /= float64(countSeries)
-			}
-			key := k.(string)
-			ctx.appendSeries(key, suffix, rate)
-		}
-		return true
-	})
-}

lib/streamaggr/stddev.go

@@ -2,93 +2,27 @@ package streamaggr
 
 import (
 	"math"
-	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 )
 
-// stddevAggrState calculates output=stddev, e.g. the average value over input samples.
+// stddevAggrValue calculates output=stddev, e.g. the average value over input samples.
-type stddevAggrState struct {
+type stddevAggrValue struct {
-	m sync.Map
-}
-
-type stddevStateValue struct {
-	mu             sync.Mutex
-	state          [aggrStateSize]stddevState
-	deleted        bool
-	deleteDeadline int64
-}
-
-type stddevState struct {
 	count float64
 	avg   float64
 	q     float64
 }
 
-func newStddevAggrState() *stddevAggrState {
+func (av *stddevAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &stddevAggrState{}
+	av.count++
+	avg := av.avg + (ctx.sample.value-av.avg)/av.count
+	av.q += (ctx.sample.value - av.avg) * (ctx.sample.value - avg)
+	av.avg = avg
 }
 
-func (as *stddevAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
+func (av *stddevAggrValue) flush(ctx *flushCtx, key string) {
-	for i := range samples {
+	if av.count > 0 {
-		s := &samples[i]
+		ctx.appendSeries(key, "stddev", math.Sqrt(av.q/av.count))
-		outputKey := getOutputKey(s.key)
+		av.count = 0
-
+		av.avg = 0
-	again:
+		av.q = 0
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &stddevStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*stddevStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			// See `Rapid calculation methods` at https://en.wikipedia.org/wiki/Standard_deviation
-			state := &sv.state[idx]
-			state.count++
-			avg := state.avg + (s.value-state.avg)/state.count
-			state.q += (s.value - state.avg) * (s.value - avg)
-			state.avg = avg
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
 	}
 }
-
-func (as *stddevAggrState) flushState(ctx *flushCtx) {
-	m := &as.m
-	m.Range(func(k, v any) bool {
-		sv := v.(*stddevStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = stddevState{}
-		sv.mu.Unlock()
-		if state.count > 0 {
-			key := k.(string)
-			ctx.appendSeries(key, "stddev", math.Sqrt(state.q/state.count))
-		}
-		return true
-	})
-}

lib/streamaggr/stdvar.go

@@ -1,93 +1,24 @@
 package streamaggr
 
-import (
+// stdvarAggrValue calculates output=stdvar, e.g. the average value over input samples.
-	"sync"
+type stdvarAggrValue struct {
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-)
-
-// stdvarAggrState calculates output=stdvar, e.g. the average value over input samples.
-type stdvarAggrState struct {
-	m sync.Map
-}
-
-type stdvarStateValue struct {
-	mu             sync.Mutex
-	state          [aggrStateSize]stdvarState
-	deleted        bool
-	deleteDeadline int64
-}
-
-type stdvarState struct {
 	count float64
 	avg   float64
 	q     float64
 }
 
-func newStdvarAggrState() *stdvarAggrState {
+func (av *stdvarAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &stdvarAggrState{}
+	av.count++
+	avg := av.avg + (ctx.sample.value-av.avg)/av.count
+	av.q += (ctx.sample.value - av.avg) * (ctx.sample.value - avg)
+	av.avg = avg
 }
 
-func (as *stdvarAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
+func (av *stdvarAggrValue) flush(ctx *flushCtx, key string) {
-	for i := range samples {
+	if av.count > 0 {
-		s := &samples[i]
+		ctx.appendSeries(key, "stdvar", av.q/av.count)
-		outputKey := getOutputKey(s.key)
+		av.count = 0
-
+		av.avg = 0
-	again:
+		av.q = 0
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &stdvarStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*stdvarStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			// See `Rapid calculation methods` at https://en.wikipedia.org/wiki/Standard_deviation
-			state := &sv.state[idx]
-			state.count++
-			avg := state.avg + (s.value-state.avg)/state.count
-			state.q += (s.value - state.avg) * (s.value - avg)
-			state.avg = avg
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
 	}
 }
-
-func (as *stdvarAggrState) flushState(ctx *flushCtx) {
-	m := &as.m
-	m.Range(func(k, v any) bool {
-		sv := v.(*stdvarStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = stdvarState{}
-		sv.mu.Unlock()
-		if state.count > 0 {
-			key := k.(string)
-			ctx.appendSeries(key, "stdvar", state.q/state.count)
-		}
-		return true
-	})
-}

lib/streamaggr/streamaggr.go

@@ -27,9 +27,6 @@ import (
 	"gopkg.in/yaml.v2"
 )
 
-// count of aggregation intervals for states
-const aggrStateSize = 2
-
 var supportedOutputs = []string{
 	"avg",
 	"count_samples",
@@ -144,6 +141,9 @@ type Options struct {
 	//
 	// By default, aggregates samples are dropped, while the remaining samples are written to the corresponding -remoteWrite.url.
 	KeepInput bool
+
+	// StateSize defines a number of intervals to aggregate for
+	StateSize int
 }
 
 // Config is a configuration for a single stream aggregation.
@@ -246,6 +246,9 @@ type Config struct {
 	// OutputRelabelConfigs is an optional relabeling rules, which are applied
 	// on the aggregated output before being sent to remote storage.
 	OutputRelabelConfigs []promrelabel.RelabelConfig `yaml:"output_relabel_configs,omitempty"`
+
+	// StateSize
+	StateSize *int `yaml:"state_size,omitempty"`
 }
 
 // Aggregators aggregates metrics passed to Push and calls pushFunc for aggregated data.
@@ -394,14 +397,14 @@ type aggregator struct {
 	da *dedupAggr
 
 	// aggrOutputs contains aggregate states for the given outputs
-	aggrOutputs []aggrOutput
+	aggrOutputs *aggrOutputs
 
 	// minTimestamp is used for ignoring old samples when ignoreOldSamples is set
 	minTimestamp atomic.Int64
 
 	// time to wait after interval end before flush
 	flushAfter   *histogram.Fast
-	muFlushAfter sync.Mutex
+	flushAfterMu sync.Mutex
 
 	// suffix contains a suffix, which should be added to aggregate metric names
 	//
@@ -424,26 +427,10 @@ type aggregator struct {
 	matchedSamples     *metrics.Counter
 }
 
-type aggrOutput struct {
-	as aggrState
-
-	outputSamples *metrics.Counter
-}
-
-type aggrState interface {
-	// pushSamples must push samples to the aggrState.
-	//
-	// samples[].key must be cloned by aggrState, since it may change after returning from pushSamples.
-	pushSamples(samples []pushSample, deleteDeadline int64, idx int)
-
-	// flushState must flush aggrState data to ctx.
-	flushState(ctx *flushCtx)
-}
-
 // PushFunc is called by Aggregators when it needs to push its state to metrics storage
 type PushFunc func(tss []prompbmarshal.TimeSeries)
 
-type aggrPushFunc func(samples []pushSample, deleteDeadline int64, idx int)
+type aggrPushFunc func(data *pushCtxData)
 
 // newAggregator creates new aggregator for the given cfg, which pushes the aggregate data to pushFunc.
 //
@@ -554,6 +541,16 @@ func newAggregator(cfg *Config, path string, pushFunc PushFunc, ms *metrics.Set,
 		ignoreFirstIntervals = *v
 	}
 
+	// check cfg.StateSize
+	stateSize := opts.StateSize
+	if v := cfg.StateSize; v != nil {
+		stateSize = *v
+	}
+
+	if stateSize < 1 {
+		return nil, fmt.Errorf("`state_size` must be greater or equal to 1")
+	}
+
 	// Initialize common metric labels
 	name := cfg.Name
 	if name == "" {
@@ -566,18 +563,18 @@ func newAggregator(cfg *Config, path string, pushFunc PushFunc, ms *metrics.Set,
 		return nil, fmt.Errorf("`outputs` list must contain at least a single entry from the list %s; "+
 			"see https://docs.victoriametrics.com/stream-aggregation/", supportedOutputs)
 	}
-	aggrOutputs := make([]aggrOutput, len(cfg.Outputs))
+	aggrOutputs := &aggrOutputs{
+		initFns:       make([]aggrValuesFn, len(cfg.Outputs)),
+		outputSamples: ms.NewCounter(fmt.Sprintf(`vm_streamaggr_output_samples_total{outputs=%q,%s}`, "test", metricLabels)),
+		stateSize:     stateSize,
+	}
 	outputsSeen := make(map[string]struct{}, len(cfg.Outputs))
 	for i, output := range cfg.Outputs {
-		as, err := newAggrState(output, outputsSeen, stalenessInterval)
+		oc, err := newOutputInitFns(output, outputsSeen, stateSize)
 		if err != nil {
 			return nil, err
 		}
-		aggrOutputs[i] = aggrOutput{
+		aggrOutputs.initFns[i] = oc
-			as: as,
-
-			outputSamples: ms.NewCounter(fmt.Sprintf(`vm_streamaggr_output_samples_total{output=%q,%s}`, output, metricLabels)),
-		}
 	}
 
 	// initialize suffix to add to metric names after aggregation
@@ -629,7 +626,7 @@ func newAggregator(cfg *Config, path string, pushFunc PushFunc, ms *metrics.Set,
 	}
 
 	if dedupInterval > 0 {
-		a.da = newDedupAggr()
+		a.da = newDedupAggr(stateSize)
 
 		_ = ms.NewGauge(fmt.Sprintf(`vm_streamaggr_dedup_state_size_bytes{%s}`, metricLabels), func() float64 {
 			n := a.da.sizeBytes()
@@ -667,7 +664,7 @@ func newAggregator(cfg *Config, path string, pushFunc PushFunc, ms *metrics.Set,
 	return a, nil
 }
 
-func newAggrState(output string, outputsSeen map[string]struct{}, stalenessInterval time.Duration) (aggrState, error) {
+func newOutputInitFns(output string, outputsSeen map[string]struct{}, stateSize int) (aggrValuesFn, error) {
 	// check for duplicated output
 	if _, ok := outputsSeen[output]; ok {
 		return nil, fmt.Errorf("`outputs` list contains duplicate aggregation function: %s", output)
@@ -699,44 +696,44 @@ func newAggrState(output string, outputsSeen map[string]struct{}, stalenessInter
 			return nil, fmt.Errorf("`outputs` list contains duplicated `quantiles()` function, please combine multiple phi* like `quantiles(0.5, 0.9)`")
 		}
 		outputsSeen["quantiles"] = struct{}{}
-		return newQuantilesAggrState(phis), nil
+		return newAggrValues[quantilesAggrValue](quantilesInitFn(stateSize, phis)), nil
 	}
 
 	switch output {
 	case "avg":
-		return newAvgAggrState(), nil
+		return newAggrValues[avgAggrValue](nil), nil
 	case "count_samples":
-		return newCountSamplesAggrState(), nil
+		return newAggrValues[countSamplesAggrValue](nil), nil
 	case "count_series":
-		return newCountSeriesAggrState(), nil
+		return newAggrValues[countSeriesAggrValue](countSeriesInitFn), nil
 	case "histogram_bucket":
-		return newHistogramBucketAggrState(), nil
+		return newAggrValues[histogramBucketAggrValue](nil), nil
 	case "increase":
-		return newTotalAggrState(true, true), nil
+		return newAggrValues[totalAggrValue](totalInitFn(true, true)), nil
 	case "increase_prometheus":
-		return newTotalAggrState(true, false), nil
+		return newAggrValues[totalAggrValue](totalInitFn(true, false)), nil
 	case "last":
-		return newLastAggrState(), nil
+		return newAggrValues[lastAggrValue](nil), nil
 	case "max":
-		return newMaxAggrState(), nil
+		return newAggrValues[maxAggrValue](nil), nil
 	case "min":
-		return newMinAggrState(), nil
+		return newAggrValues[minAggrValue](nil), nil
 	case "rate_avg":
-		return newRateAggrState(true), nil
+		return newAggrValues[rateAggrValue](rateInitFn(true)), nil
 	case "rate_sum":
-		return newRateAggrState(false), nil
+		return newAggrValues[rateAggrValue](rateInitFn(false)), nil
 	case "stddev":
-		return newStddevAggrState(), nil
+		return newAggrValues[stddevAggrValue](nil), nil
 	case "stdvar":
-		return newStdvarAggrState(), nil
+		return newAggrValues[stdvarAggrValue](nil), nil
 	case "sum_samples":
-		return newSumSamplesAggrState(), nil
+		return newAggrValues[sumSamplesAggrValue](nil), nil
 	case "total":
-		return newTotalAggrState(false, true), nil
+		return newAggrValues[totalAggrValue](totalInitFn(false, true)), nil
 	case "total_prometheus":
-		return newTotalAggrState(false, false), nil
+		return newAggrValues[totalAggrValue](totalInitFn(false, false)), nil
 	case "unique_samples":
-		return newUniqueSamplesAggrState(), nil
+		return newAggrValues[uniqueSamplesAggrValue](uniqueSamplesInitFn), nil
 	default:
 		return nil, fmt.Errorf("unsupported output=%q; supported values: %s; see https://docs.victoriametrics.com/stream-aggregation/", output, supportedOutputs)
 	}
@@ -758,15 +755,11 @@ func (a *aggregator) runFlusher(pushFunc PushFunc, alignFlushToInterval, skipInc
 		}
 	}
 
-	var flushTimeMsec int64
 	tickerWait := func(t *time.Ticker) bool {
 		select {
 		case <-a.stopCh:
-			flushTimeMsec = time.Now().UnixMilli()
 			return false
-		case ct := <-t.C:
+		case <-t.C:
-			flushTimeMsec = ct.UnixMilli()
-			fmt.Println(flushTimeMsec)
 			return true
 		}
 	}
@@ -791,10 +784,10 @@ func (a *aggregator) runFlusher(pushFunc PushFunc, alignFlushToInterval, skipInc
 		pf := pushFunc
 
 		// Calculate delay
-		a.muFlushAfter.Lock()
+		a.flushAfterMu.Lock()
 		flushAfterMsec := a.flushAfter.Quantile(0.95)
 		a.flushAfter.Reset()
-		a.muFlushAfter.Unlock()
+		a.flushAfterMu.Unlock()
 		flushAfter := time.Duration(flushAfterMsec) * time.Millisecond
 
 		if flushAfter > tickInterval {
@@ -805,7 +798,8 @@ func (a *aggregator) runFlusher(pushFunc PushFunc, alignFlushToInterval, skipInc
 			time.Sleep(flushAfter)
 		}
 
-		a.dedupFlush(dedupTime.UnixMilli(), dedupIdx, flushIdx)
+		deleteDeadline := dedupTime.Add(a.stalenessInterval)
+		a.dedupFlush(deleteDeadline.UnixMilli(), dedupIdx, flushIdx)
 
 		if ct.After(flushDeadline) {
 			// It is time to flush the aggregated state
@@ -832,25 +826,26 @@ func (a *aggregator) runFlusher(pushFunc PushFunc, alignFlushToInterval, skipInc
 
 	if !skipIncompleteFlush && ignoreFirstIntervals <= 0 {
 		dedupTime := time.Now().Truncate(tickInterval).Add(tickInterval)
+		deleteDeadline := flushDeadline.Add(a.stalenessInterval)
 		if a.ignoreOldSamples {
 			dedupIdx, flushIdx = a.getAggrIdxs(dedupTime, flushDeadline)
 		}
-		a.dedupFlush(flushDeadline.UnixMilli(), dedupIdx, flushIdx)
+		a.dedupFlush(deleteDeadline.UnixMilli(), dedupIdx, flushIdx)
 		a.flush(pushFunc, flushDeadline.UnixMilli(), flushIdx)
 	}
 }
 
 func (a *aggregator) getAggrIdxs(dedupTime, flushTime time.Time) (int, int) {
-	flushIdx := getStateIdx(a.interval.Milliseconds(), flushTime.Add(-a.interval).UnixMilli())
+	flushIdx := a.getStateIdx(a.interval.Milliseconds(), flushTime.Add(-a.interval).UnixMilli())
 	dedupIdx := flushIdx
 	if a.dedupInterval > 0 {
-		dedupIdx = getStateIdx(a.dedupInterval.Milliseconds(), dedupTime.Add(-a.dedupInterval).UnixMilli())
+		dedupIdx = a.getStateIdx(a.dedupInterval.Milliseconds(), dedupTime.Add(-a.dedupInterval).UnixMilli())
 	}
 	return dedupIdx, flushIdx
 }
 
-func getStateIdx(interval int64, ts int64) int {
+func (a *aggregator) getStateIdx(interval int64, ts int64) int {
-	return int(ts/interval) % aggrStateSize
+	return int(ts/interval) % a.aggrOutputs.stateSize
 }
 
 func (a *aggregator) dedupFlush(deleteDeadline int64, dedupIdx, flushIdx int) {
@@ -861,7 +856,7 @@ func (a *aggregator) dedupFlush(deleteDeadline int64, dedupIdx, flushIdx int) {
 
 	startTime := time.Now()
 
-	a.da.flush(a.pushSamples, deleteDeadline, dedupIdx, flushIdx)
+	a.da.flush(a.aggrOutputs.pushSamples, deleteDeadline, dedupIdx, flushIdx)
 
 	d := time.Since(startTime)
 	a.dedupFlushDuration.Update(d.Seconds())
@@ -879,24 +874,12 @@ func (a *aggregator) dedupFlush(deleteDeadline int64, dedupIdx, flushIdx int) {
 func (a *aggregator) flush(pushFunc PushFunc, flushTimeMsec int64, idx int) {
 	startTime := time.Now()
 
-	var wg sync.WaitGroup
+	ao := a.aggrOutputs
-	for i := range a.aggrOutputs {
-		ao := &a.aggrOutputs[i]
-		flushConcurrencyCh <- struct{}{}
-		wg.Add(1)
-		go func(ao *aggrOutput) {
-			defer func() {
-				<-flushConcurrencyCh
-				wg.Done()
-			}()
 
 	ctx := getFlushCtx(a, ao, pushFunc, flushTimeMsec, idx)
-			ao.as.flushState(ctx)
+	ao.flushState(ctx)
 	ctx.flushSeries()
 	putFlushCtx(ctx)
-		}(ao)
-	}
-	wg.Wait()
 
 	d := time.Since(startTime)
 	a.flushDuration.Update(d.Seconds())
@@ -921,7 +904,7 @@ func (a *aggregator) MustStop() {
 
 // Push pushes tss to a.
 func (a *aggregator) Push(tss []prompbmarshal.TimeSeries, matchIdxs []byte) {
-	ctx := getPushCtx()
+	ctx := getPushCtx(a.aggrOutputs.stateSize)
 	defer putPushCtx(ctx)
 
 	samples := ctx.samples
@@ -972,9 +955,6 @@ func (a *aggregator) Push(tss []prompbmarshal.TimeSeries, matchIdxs []byte) {
 		// do not intern key because number of unique keys could be too high
 		key := bytesutil.ToUnsafeString(buf[bufLen:])
 		for _, s := range ts.Samples {
-			a.muFlushAfter.Lock()
-                        a.flushAfter.Update(float64(nowMsec - s.Timestamp))
-                        a.muFlushAfter.Unlock()
 			if math.IsNaN(s.Value) {
 				// Skip NaN values
 				a.ignoredNaNSamples.Inc()
@@ -990,7 +970,7 @@ func (a *aggregator) Push(tss []prompbmarshal.TimeSeries, matchIdxs []byte) {
 				maxLagMsec = lagMsec
 			}
 			if ignoreOldSamples {
-				flushIdx = getStateIdx(a.tickInterval, s.Timestamp)
+				flushIdx = a.getStateIdx(a.tickInterval, s.Timestamp)
 			}
 			samples[flushIdx] = append(samples[flushIdx], pushSample{
 				key:       key,
@@ -999,11 +979,14 @@ func (a *aggregator) Push(tss []prompbmarshal.TimeSeries, matchIdxs []byte) {
 			})
 		}
 	}
+	a.flushAfterMu.Lock()
+	a.flushAfter.Update(float64(maxLagMsec))
+	a.flushAfterMu.Unlock()
 
 	ctx.samples = samples
 	ctx.buf = buf
 
-	pushSamples := a.pushSamples
+	pushSamples := a.aggrOutputs.pushSamples
 	if a.da != nil {
 		pushSamples = a.da.pushSamples
 	}
@@ -1012,7 +995,8 @@ func (a *aggregator) Push(tss []prompbmarshal.TimeSeries, matchIdxs []byte) {
 		if len(s) > 0 {
 			a.samplesLag.Update(float64(maxLagMsec) / 1_000)
 			a.matchedSamples.Add(len(s))
-			pushSamples(s, deleteDeadlineMsec, idx)
+			data := ctx.getPushCtxData(s, nowMsec, deleteDeadlineMsec, idx)
+			pushSamples(data)
 		}
 	}
 }
@@ -1031,17 +1015,6 @@ func decompressLabels(dst []prompbmarshal.Label, key string) []prompbmarshal.Lab
 	return lc.Decompress(dst, bytesutil.ToUnsafeBytes(key))
 }
 
-func getOutputKey(key string) string {
-	src := bytesutil.ToUnsafeBytes(key)
-	inputKeyLen, nSize := encoding.UnmarshalVarUint64(src)
-	if nSize <= 0 {
-		logger.Panicf("BUG: cannot unmarshal inputKeyLen from uvarint")
-	}
-	src = src[nSize:]
-	outputKey := src[inputKeyLen:]
-	return bytesutil.ToUnsafeString(outputKey)
-}
-
 func getInputOutputKey(key string) (string, string) {
 	src := bytesutil.ToUnsafeBytes(key)
 	inputKeyLen, nSize := encoding.UnmarshalVarUint64(src)
@@ -1054,20 +1027,30 @@ func getInputOutputKey(key string) (string, string) {
 	return bytesutil.ToUnsafeString(inputKey), bytesutil.ToUnsafeString(outputKey)
 }
 
-func (a *aggregator) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
+type pushCtxData struct {
-	for _, ao := range a.aggrOutputs {
+	samples        []pushSample
-		ao.as.pushSamples(samples, deleteDeadline, idx)
+	deleteDeadline int64
-	}
+	idx            int
+	now            int64
 }
 
 type pushCtx struct {
-	samples      [aggrStateSize][]pushSample
+	samples      [][]pushSample
 	labels       promutils.Labels
 	inputLabels  promutils.Labels
 	outputLabels promutils.Labels
 	buf          []byte
 }
 
+func (ctx *pushCtx) getPushCtxData(samples []pushSample, now, deleteDeadline int64, idx int) *pushCtxData {
+	return &pushCtxData{
+		samples:        samples,
+		deleteDeadline: deleteDeadline,
+		idx:            idx,
+		now:            now,
+	}
+}
+
 func (ctx *pushCtx) reset() {
 	for i := range ctx.samples {
 		ctx.samples[i] = ctx.samples[i][:0]
@@ -1087,10 +1070,12 @@ type pushSample struct {
 	timestamp int64
 }
 
-func getPushCtx() *pushCtx {
+func getPushCtx(stateSize int) *pushCtx {
 	v := pushCtxPool.Get()
 	if v == nil {
-		return &pushCtx{}
+		return &pushCtx{
+			samples: make([][]pushSample, stateSize),
+		}
 	}
 	return v.(*pushCtx)
 }
@@ -1123,7 +1108,7 @@ func getInputOutputLabels(dstInput, dstOutput, labels []prompbmarshal.Label, by,
 	return dstInput, dstOutput
 }
 
-func getFlushCtx(a *aggregator, ao *aggrOutput, pushFunc PushFunc, flushTimestamp int64, idx int) *flushCtx {
+func getFlushCtx(a *aggregator, ao *aggrOutputs, pushFunc PushFunc, flushTimestamp int64, idx int) *flushCtx {
 	v := flushCtxPool.Get()
 	if v == nil {
 		v = &flushCtx{}
@@ -1146,7 +1131,7 @@ var flushCtxPool sync.Pool
 
 type flushCtx struct {
 	a              *aggregator
-	ao             *aggrOutput
+	ao             *aggrOutputs
 	pushFunc       PushFunc
 	flushTimestamp int64
 	idx            int

lib/streamaggr/streamaggr_test.go

@@ -200,11 +200,14 @@ func TestAggregatorsEqual(t *testing.T) {
 		t.Helper()
 
 		pushFunc := func(_ []prompbmarshal.TimeSeries) {}
-		aa, err := LoadFromData([]byte(a), pushFunc, nil, "some_alias")
+		opts := Options{
+			StateSize: 2,
+		}
+		aa, err := LoadFromData([]byte(a), pushFunc, &opts, "some_alias")
 		if err != nil {
 			t.Fatalf("cannot initialize aggregators: %s", err)
 		}
-		ab, err := LoadFromData([]byte(b), pushFunc, nil, "some_alias")
+		ab, err := LoadFromData([]byte(b), pushFunc, &opts, "some_alias")
 		if err != nil {
 			t.Fatalf("cannot initialize aggregators: %s", err)
 		}
@@ -266,6 +269,7 @@ func TestAggregatorsSuccess(t *testing.T) {
 		opts := &Options{
 			FlushOnShutdown:        true,
 			NoAlignFlushToInterval: true,
+			StateSize:              2,
 		}
 		a, err := LoadFromData([]byte(config), pushFunc, opts, "some_alias")
 		if err != nil {
@@ -985,6 +989,7 @@ func TestAggregatorsWithDedupInterval(t *testing.T) {
 		opts := &Options{
 			DedupInterval:   30 * time.Second,
 			FlushOnShutdown: true,
+			StateSize:       2,
 		}
 		a, err := LoadFromData([]byte(config), pushFunc, opts, "some_alias")
 		if err != nil {

lib/streamaggr/sum_samples.go

@@ -1,88 +1,14 @@
 package streamaggr
 
-import (
+type sumSamplesAggrValue struct {
-	"sync"
-
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
-)
-
-// sumSamplesAggrState calculates output=sum_samples, e.g. the sum over input samples.
-type sumSamplesAggrState struct {
-	m sync.Map
-}
-
-type sumSamplesStateValue struct {
-	mu             sync.Mutex
-	state          [aggrStateSize]sumState
-	deleted        bool
-	deleteDeadline int64
-}
-
-type sumState struct {
 	sum float64
-	exists bool
 }
 
-func newSumSamplesAggrState() *sumSamplesAggrState {
+func (av *sumSamplesAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &sumSamplesAggrState{}
+	av.sum += ctx.sample.value
 }
 
-func (as *sumSamplesAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
+func (av *sumSamplesAggrValue) flush(ctx *flushCtx, key string) {
-	for i := range samples {
+	ctx.appendSeries(key, "sum_samples", av.sum)
-		s := &samples[i]
+	av.sum = 0
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			v = &sumSamplesStateValue{}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Update the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*sumSamplesStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			sv.state[idx].sum += s.value
-			sv.state[idx].exists = true
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
-	}
-}
-
-func (as *sumSamplesAggrState) flushState(ctx *flushCtx) {
-	m := &as.m
-	m.Range(func(k, v any) bool {
-		sv := v.(*sumSamplesStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		state := sv.state[ctx.idx]
-		sv.state[ctx.idx] = sumState{}
-		sv.mu.Unlock()
-		if state.exists {
-			key := k.(string)
-			ctx.appendSeries(key, "sum_samples", state.sum)
-		}
-		return true
-	})
 }

lib/streamaggr/total.go

@@ -2,155 +2,100 @@ package streamaggr
 
 import (
 	"math"
-	"sync"
 
 	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
 )
 
-// totalAggrState calculates output=total, total_prometheus, increase and increase_prometheus.
+func totalInitFn(resetTotalOnFlush, keepFirstSample bool) aggrValuesInitFn {
-type totalAggrState struct {
+	return func(values []aggrValue) []aggrValue {
-	m sync.Map
+		shared := &totalAggrValueShared{
-
+			lastValues: make(map[string]totalLastValue),
-	// Whether to reset the output value on every flushState call.
+		}
-	resetTotalOnFlush bool
+		for i := range values {
-
+			values[i] = &totalAggrValue{
-	// Whether to take into account the first sample in new time series when calculating the output value.
+				keepFirstSample:   keepFirstSample,
-	keepFirstSample bool
+				resetTotalOnFlush: resetTotalOnFlush,
+				shared:            shared,
+			}
+		}
+		return values
+	}
 }
 
-type totalStateValue struct {
+type totalLastValue struct {
-	mu             sync.Mutex
-	shared         totalState
-	state          [aggrStateSize]float64
-	deleteDeadline int64
-	deleted        bool
-}
-
-type totalState struct {
-	total      float64
-	lastValues map[string]totalLastValueState
-}
-
-type totalLastValueState struct {
 	value          float64
 	timestamp      int64
 	deleteDeadline int64
 }
 
-func newTotalAggrState(resetTotalOnFlush, keepFirstSample bool) *totalAggrState {
+type totalAggrValueShared struct {
-	return &totalAggrState{
+	lastValues map[string]totalLastValue
-		resetTotalOnFlush:         resetTotalOnFlush,
+	total      float64
-		keepFirstSample:           keepFirstSample,
-	}
 }
 
-func (as *totalAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
+type totalAggrValue struct {
-	var deleted bool
+	total             float64
-	for i := range samples {
+	keepFirstSample   bool
-		s := &samples[i]
+	resetTotalOnFlush bool
-		inputKey, outputKey := getInputOutputKey(s.key)
+	shared            *totalAggrValueShared
+}
 
-	again:
+func (av *totalAggrValue) pushSample(ctx *pushSampleCtx) {
-		v, ok := as.m.Load(outputKey)
+	shared := av.shared
-		if !ok {
+	inputKey := ctx.inputKey
-			// The entry is missing in the map. Try creating it.
+	lv, ok := shared.lastValues[inputKey]
-			v = &totalStateValue{
+	if ok || av.keepFirstSample {
-				shared: totalState{
+		if ctx.sample.timestamp < lv.timestamp {
-					lastValues: make(map[string]totalLastValueState),
-				},
-			}
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Use the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*totalStateValue)
-		sv.mu.Lock()
-		deleted = sv.deleted
-		if !deleted {
-			lv, ok := sv.shared.lastValues[inputKey]
-			if ok || as.keepFirstSample {
-				if s.timestamp < lv.timestamp {
 			// Skip out of order sample
-					sv.mu.Unlock()
+			return
-					continue
 		}
-
+		if ctx.sample.value >= lv.value {
-				if s.value >= lv.value {
+			av.total += ctx.sample.value - lv.value
-					sv.state[idx] += s.value - lv.value
 		} else {
 			// counter reset
-					sv.state[idx] += s.value
+			av.total += ctx.sample.value
 		}
 	}
-			lv.value = s.value
+	lv.value = ctx.sample.value
-			lv.timestamp = s.timestamp
+	lv.timestamp = ctx.sample.timestamp
-			lv.deleteDeadline = deleteDeadline
+	lv.deleteDeadline = ctx.deleteDeadline
 
 	inputKey = bytesutil.InternString(inputKey)
-			sv.shared.lastValues[inputKey] = lv
+	shared.lastValues[inputKey] = lv
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
-	}
 }
 
-func (as *totalAggrState) getSuffix() string {
+func (av *totalAggrValue) flush(ctx *flushCtx, key string) {
+	suffix := av.getSuffix()
+	// check for stale entries
+	total := av.shared.total + av.total
+	av.total = 0
+	lvs := av.shared.lastValues
+	for lk, lv := range lvs {
+		if ctx.flushTimestamp > lv.deleteDeadline {
+			delete(lvs, lk)
+		}
+	}
+	if av.resetTotalOnFlush {
+		av.shared.total = 0
+	} else if math.Abs(total) >= (1 << 53) {
+		// It is time to reset the entry, since it starts losing float64 precision
+		av.shared.total = 0
+	} else {
+		av.shared.total = total
+	}
+	ctx.appendSeries(key, suffix, total)
+}
+
+func (av *totalAggrValue) getSuffix() string {
 	// Note: this function is at hot path, so it shouldn't allocate.
-        if as.resetTotalOnFlush {
+	if av.resetTotalOnFlush {
-                if as.keepFirstSample {
+		if av.keepFirstSample {
 			return "increase"
 		}
 		return "increase_prometheus"
 	}
-        if as.keepFirstSample {
+	if av.keepFirstSample {
 		return "total"
 	}
 	return "total_prometheus"
 }
-
-func (as *totalAggrState) flushState(ctx *flushCtx) {
-	var total float64
-	m := &as.m
-	suffix := as.getSuffix()
-	m.Range(func(k, v interface{}) bool {
-		sv := v.(*totalStateValue)
-
-		sv.mu.Lock()
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		total = sv.shared.total + sv.state[ctx.idx]
-		for k1, v1 := range sv.shared.lastValues {
-			if ctx.flushTimestamp > v1.deleteDeadline {
-				delete(sv.shared.lastValues, k1)
-			}
-		}
-		sv.state[ctx.idx] = 0
-		if !as.resetTotalOnFlush {
-			if math.Abs(total) >= (1 << 53) {
-				// It is time to reset the entry, since it starts losing float64 precision
-				sv.shared.total = 0
-			} else {
-				sv.shared.total = total
-			}
-		}
-		sv.mu.Unlock()
-		key := k.(string)
-		ctx.appendSeries(key, suffix, total)
-		return true
-	})
-}

lib/streamaggr/unique_samples.go

@@ -1,86 +1,25 @@
 package streamaggr
 
-import (
+func uniqueSamplesInitFn(values []aggrValue) []aggrValue {
-	"sync"
+	for i := range values {
-
+		values[i] = &uniqueSamplesAggrValue{
-	"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
+			samples: make(map[float64]struct{}),
-)
+		}
-
+	}
-// uniqueSamplesAggrState calculates output=unique_samples, e.g. the number of unique sample values.
+	return values
-type uniqueSamplesAggrState struct {
-	m sync.Map
 }
 
-type uniqueSamplesStateValue struct {
+type uniqueSamplesAggrValue struct {
-	mu             sync.Mutex
+	samples map[float64]struct{}
-	state          [aggrStateSize]map[float64]struct{}
-	deleted        bool
-	deleteDeadline int64
 }
 
-func newUniqueSamplesAggrState() *uniqueSamplesAggrState {
+func (av *uniqueSamplesAggrValue) pushSample(ctx *pushSampleCtx) {
-	return &uniqueSamplesAggrState{}
+	if _, ok := av.samples[ctx.sample.value]; !ok {
-}
+		av.samples[ctx.sample.value] = struct{}{}
-
-func (as *uniqueSamplesAggrState) pushSamples(samples []pushSample, deleteDeadline int64, idx int) {
-	for i := range samples {
-		s := &samples[i]
-		outputKey := getOutputKey(s.key)
-
-	again:
-		v, ok := as.m.Load(outputKey)
-		if !ok {
-			// The entry is missing in the map. Try creating it.
-			usv := &uniqueSamplesStateValue{}
-			for iu := range usv.state {
-				usv.state[iu] = make(map[float64]struct{})
-			}
-			v = usv
-			outputKey = bytesutil.InternString(outputKey)
-			vNew, loaded := as.m.LoadOrStore(outputKey, v)
-			if loaded {
-				// Update the entry created by a concurrent goroutine.
-				v = vNew
-			}
-		}
-		sv := v.(*uniqueSamplesStateValue)
-		sv.mu.Lock()
-		deleted := sv.deleted
-		if !deleted {
-			if _, ok := sv.state[idx][s.value]; !ok {
-				sv.state[idx][s.value] = struct{}{}
-			}
-			sv.deleteDeadline = deleteDeadline
-		}
-		sv.mu.Unlock()
-		if deleted {
-			// The entry has been deleted by the concurrent call to flushState
-			// Try obtaining and updating the entry again.
-			goto again
-		}
 	}
 }
 
-func (as *uniqueSamplesAggrState) flushState(ctx *flushCtx) {
+func (av *uniqueSamplesAggrValue) flush(ctx *flushCtx, key string) {
-	m := &as.m
+	ctx.appendSeries(key, "unique_samples", float64(len(av.samples)))
-	m.Range(func(k, v any) bool {
+	clear(av.samples)
-		sv := v.(*uniqueSamplesStateValue)
-		sv.mu.Lock()
-
-		// check for stale entries
-		deleted := ctx.flushTimestamp > sv.deleteDeadline
-		if deleted {
-			// Mark the current entry as deleted
-			sv.deleted = deleted
-			sv.mu.Unlock()
-			m.Delete(k)
-			return true
-		}
-		state := len(sv.state[ctx.idx])
-		sv.state[ctx.idx] = make(map[float64]struct{})
-		sv.mu.Unlock()
-		key := k.(string)
-		ctx.appendSeries(key, "unique_samples", float64(state))
-		return true
-	})
 }