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app/vmselect/prometheus: remove stale NaN for range vector query

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This commit is contained in:
hao.peng 2024-10-30 16:49:39 +08:00
parent 9ea5ceffdb
commit dd2da3bce5
1 changed files with 13 additions and 6 deletions
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19
app/vmselect/prometheus/prometheus.go
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@ -12,6 +12,7 @@ import (
"sync/atomic"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/decimal"
"github.com/VictoriaMetrics/metrics"
"github.com/VictoriaMetrics/metricsql"
"github.com/valyala/fastjson/fastfloat"
@ -22,7 +23,6 @@ import (
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bufferedwriter"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/decimal"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/encoding"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/fasttime"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
@ -312,6 +312,7 @@ func ExportHandler(startTime time.Time, w http.ResponseWriter, r *http.Request)
var exportDuration = metrics.NewSummary(`vm_request_duration_seconds{path="/api/v1/export"}`)
func exportHandler(qt *querytracer.Tracer, w http.ResponseWriter, cp *commonParams, format string, maxRowsPerLine int, reduceMemUsage bool) error {
var dropStale bool
bw := bufferedwriter.Get(w)
defer bufferedwriter.Put(bw)
sw := newScalableWriter(bw)
@ -329,6 +330,7 @@ func exportHandler(qt *querytracer.Tracer, w http.ResponseWriter, cp *commonPara
return sw.maybeFlushBuffer(bb)
}
} else if format == "promapi" {
dropStale = true
WriteExportPromAPIHeader(bw)
var firstLineOnce atomic.Bool
var firstLineSent atomic.Bool
@ -403,12 +405,17 @@ func exportHandler(qt *querytracer.Tracer, w http.ResponseWriter, cp *commonPara
}
xb := exportBlockPool.Get().(*exportBlock)
xb.mn = &rs.MetricName
for i, v := range rs.Values {
if decimal.IsStaleNaN(v) {
continue
if dropStale {
for i, v := range rs.Values {
if decimal.IsStaleNaN(v) {
continue
}
xb.values = append(xb.values, v)
xb.timestamps = append(xb.timestamps, rs.Timestamps[i])
}
xb.values = append(xb.values, v)
xb.timestamps = append(xb.timestamps, rs.Timestamps[i])
} else {
xb.timestamps = rs.Timestamps
xb.values = rs.Values
}
if err := writeLineFunc(xb, workerID); err != nil {
return err