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41 commits

Author SHA1 Message Date
Aliaksandr Valialkin
92826b0b4a
app/vmselect/promql: apply SLO-like optimization to all the count_*_over_time() functions 
This is a follow-up for 41a0fdaf39
 2023-11-01 09:58:16 +01:00
Aliaksandr Valialkin
41a0fdaf39
app/vmselect/promql: optimize repeated SLI-like instant queries with lookbehind windows >= 1d 
Repeated instant queries with long lookbehind windows, which contain one of the following rollup functions,
are optimized via partial result caching:

- sum_over_time()
- count_over_time()
- avg_over_time()
- increase()
- rate()

The basic idea of optimization is to calculate

  rf(m[d] @ t)

as

  rf(m[offset] @ t) + rf(m[d] @ (t-offset)) - rf(m[offset] @ (t-d))

where rf(m[d] @ (t-offset)) is cached query result, which was calculated previously

The offset may be in the range of up to 1 hour.
 2023-10-31 19:25:23 +01:00
Nikolay
1f91f22b5f
app/vmselect: reduce lock contention for heavy aggregation requests (#5119) 
reduce lock contention for heavy aggregation requests
previously lock contetion may happen on machine with big number of CPU due to enabled string interning. sync.Map was a choke point for all aggregation requests.
Now instead of interning, new string is created. It may increase CPU and memory usage for some cases.
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5087
 2023-10-10 13:45:20 +02:00
Aliaksandr Valialkin
140e7b6b74
all: replace atomic.Value with atomic.Pointer[T] 
This eliminates the need in .(*T) casting for results obtained from Load()

Leave atomic.Value for map, since atomic.Pointer[map[...]...] makes double pointer to map,
because map is already a pointer type.
 2023-07-19 17:42:06 -07:00
Aliaksandr Valialkin
30425ca81a
lib/fs: rename WriteFileAtomically to MustWriteAtomic 
Callers of this function log the returned error and exit.
So let's just log the error with the given filepath and the call stack
inside the function itself and then exit. This simplifies the code
at callers' place while leaves the same level of debuggability in case of errors.
 2023-04-13 22:41:15 -07:00
Aliaksandr Valialkin
e8225d7d6b
app/vmselect/promql: prevent from cannot unmarshal timeseries from rollupResultCache panic after the upgrade to v1.89.0 
The issue has been introduced in 0af9e2b693
 2023-03-12 19:09:39 -07:00
Aliaksandr Valialkin
30ed33fae0
app/vmselect/promql: pre-allocate memory for values to be merged in mergeTimeseries() 
This should reduce the number of memory re-allocations
 2023-01-09 22:51:17 -08:00
Aliaksandr Valialkin
645c24dc5f
app/vmselect/promql: consistently intern series names obtained from marshalMetricNameSorted 
This reduces memory allocations when the returned series names are used as map keys later
 2023-01-09 22:45:40 -08:00
Aliaksandr Valialkin
2f3ddd4884
app/vmselect/promql: avoid memory allocations and copying from source timeseries to the returned result at timeseriesToResult() 2023-01-09 22:38:59 -08:00
Aliaksandr Valialkin
c4265322f4
lib/fs: add canOverwrite arg to WriteFileAtomically when it is allowed to overwrite the file atomically if it already exists 2022-10-26 01:07:34 +03:00
Aliaksandr Valialkin
a10647e0bf
app/vmselect/promql: expose missing metric vm_cache_size_max_bytes{type="promql/rollupResult"} 2022-10-23 12:13:47 +03:00
Aliaksandr Valialkin
9f94c295ab
all: use os.{Read|Write}File instead of ioutil.{Read|Write}File 
The ioutil.{Read|Write}File is deprecated since Go1.16 -
see https://tip.golang.org/doc/go1.16#ioutil

VictoriaMetrics needs at least Go1.18, so it is safe to remove ioutil usage
from source code.

This is a follow-up for 02ca2342ab
 2022-08-21 23:52:35 +03:00
Aliaksandr Valialkin
3e2dd85f7d
all: readability improvements for query traces 
- show dates in human-readable format, e.g. 2022-05-07, instead of a numeric value
- limit the maximum length of queries and filters shown in trace messages
 2022-06-30 18:20:33 +03:00
Aliaksandr Valialkin
a963b2a0aa
all: show timeRange in traces in human-readable format instead of timestamps in milliseconds 2022-06-27 13:45:51 +03:00
Aliaksandr Valialkin
12ac255dae
lib/querytracer: make it easier to use by passing trace context message to New and NewChild 
The context message can be extended by calling Donef.
If there is no need to extend the message, then just call Done.
 2022-06-08 21:06:52 +03:00
Aliaksandr Valialkin
41958ed5dd
all: add initial support for query tracing 
See https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html#query-tracing

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1403
 2022-06-01 02:29:23 +03:00
Aliaksandr Valialkin
61c7f6beae
app/vmselect/promql: allow calling InitRollupResultCache+StopRollupResultCache multiple times during tests 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2406
 2022-04-11 12:34:43 +03:00
Aliaksandr Valialkin
62b46007c5
lib/workingsetcache: reduce the default cache rotation period from hour to 20 minutes 
This should reduce memory usage under high time series churn rate
 2022-02-23 13:41:45 +02:00
Aliaksandr Valialkin
ff15a752c1
app/vmselect: accept optional extra_filters[] query args for all the supported Prometheus querying APIs 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1863
 2021-12-06 17:07:09 +02:00
Aliaksandr Valialkin
bec18e4fe9 app/vmselect: add -search.disableAutoCacheReset command-line option for disabling automatic cache reset when a sample with old timestamp outside -search.cacheTimestampOffset is inserted 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1570
 2021-08-27 17:15:31 +03:00
Aliaksandr Valialkin
aa81039b42 app/vmselect: log the metric which trigger rollup result cache reset 
This should help finding the source of stale metrics
 2021-03-25 21:31:39 +02:00
Aliaksandr Valialkin
cef010d5f7 app/vmselect/promql: increment key prefix for faster reset for rollup result cache 2021-03-22 11:59:07 +02:00
Nikolay
186c078fac
adds enforced tag filters into cache key (#1095) 2021-02-27 00:15:53 +02:00
Aliaksandr Valialkin
5ebfc275e6 app/victoria-metrics: automatically reset response cache when samples with too timestamps older than now - search.cacheTimestampOffset are ingested 2020-12-14 13:08:28 +02:00
Aliaksandr Valialkin
f0c678c41b app/vmselect: do not adjust start and end query args passed to /api/v1/query_range when -search.disableCache command-line flag is set 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/563
 2020-07-30 23:14:37 +03:00
Aliaksandr Valialkin
d5dddb0953 all: use %w instead of %s for wrapping errors in fmt.Errorf 
This will simplify examining the returned errors such as httpserver.ErrorWithStatusCode .
See https://blog.golang.org/go1.13-errors for details.
 2020-06-30 23:05:11 +03:00
Aliaksandr Valialkin
0afd48d2ee lib: extract common code for returning fast unix timestamp into lib/fasttime 2020-05-14 23:02:07 +03:00
Aliaksandr Valialkin
4e4f57b121 lib/metricsql: move it to a separate repository - github.com/VictoriaMetrics/metrics 2020-04-28 15:28:22 +03:00
Aliaksandr Valialkin
2f55cabaa4 app/vmselect/promql: log when rollupResult cache is cleared 2020-02-21 20:07:01 +02:00
Aliaksandr Valialkin
ec9bf39b5b app/vmselect: add -search.cacheTimestampOffset command-line flag 
This flag can be used for removing gaps on graphs if the difference between the current time
and the timestamps from the ingested data exceeds 5 minutes.

This is the case when the time between data sources and VictoriaMetrics is improperly synchronized.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/312
 2020-02-21 13:58:06 +02:00
Aliaksandr Valialkin
680080887d all: consistently log durations in seconds with millisecond precision 
This should improve logs readability
 2020-01-22 18:28:27 +02:00
Aliaksandr Valialkin
3e09d38f29 app/vmselect/promql: fix results caching for multi-arg rollup functions such as quantile_over_time 
Previosly only a single arg was taken into account, so caching didn't work properly for multi-arg rollup funcs.
 2020-01-03 20:49:08 +02:00
Aliaksandr Valialkin
1925ee038d Rename lib/promql to lib/metricsql and apply small fixes 2019-12-25 22:03:59 +02:00
Mike Poindexter
bec62e4e43 Split Extended PromQL parsing to a separate library 2019-12-25 22:03:51 +02:00
Aliaksandr Valialkin
f4a38f7fb1 app/vmselect/promql: fix panic on -search.disableCache 
Reset the cache if it is disabled instead of stopping, since it is stopped on graceful shutdown.
 2019-08-21 17:11:52 +03:00
Aliaksandr Valialkin
9ecb994671 app/vmselect/promql: store compressed results in the cache 
This should increase rollup results cache capacity.
 2019-08-14 02:29:45 +03:00
Aliaksandr Valialkin
09fc6e22e5 all: use workingsetcache instead of fastcache 
This should reduce the amount of RAM required for processing time series
with non-zero churn rate.

The previous cache behavior can be restored with `-cache.oldBehavior` command-line flag.
 2019-08-13 21:39:34 +03:00
Aliaksandr Valialkin
a336bb4e22 app/vmselect/promql: reduce RAM usage for aggregates over big number of time series 
Calculate incremental aggregates for `aggr(metric_selector)` function instead of
keeping all the time series matching the given `metric_selector` in memory.
 2019-07-10 13:04:39 +03:00
Aliaksandr Valialkin
1fe6d784d8 all: consistency renaming: bytesSize -> sizeBytes 2019-07-10 00:47:36 +03:00
Aliaksandr Valialkin
53ea90865d app/vmselect/promql: add -search.disableCache flag for disabling response caching 
This may be useful for data back-filling, when the response caching
could interfere badly with newly added data points with timestamps
in the past.
 2019-06-04 17:30:45 +03:00
Aliaksandr Valialkin
1836c415e6 all: open-sourcing single-node version 2019-05-23 00:18:06 +03:00