396 commits

Author	SHA1	Message	Date
Aliaksandr Valialkin	a14188dd8e	app/vmselect: expose additional histograms at /metrics page, which may help get more insights for the query workload ... This commit is based on https://github.com/VictoriaMetrics/VictoriaMetrics/pull/2792	2022-06-28 20:18:13 +03:00
Aliaksandr Valialkin	a43f2d0bc5	app/vmselect/promql: show the number of scanned samples in the query trace	2022-06-28 19:26:17 +03:00
Aliaksandr Valialkin	e578549b8a	app/vmselect: optimize /api/v1/series a bit for time ranges smaller than one day	2022-06-28 13:02:47 +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	e6ed92529b	all: remove explicit "xxhash" name when importing github.com/cespare/xxhash/v2 package ... This package already has the same name, so there is no need in explicit name	2022-06-21 20:23:32 +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	a7f18f8cb2	app/vmselect/promql: do not return values from label_value() if the original time series has no values at the selected timestamps	2022-05-09 17:57:39 +03:00
Aliaksandr Valialkin	cce1b6d7f9	app/vmselect/promql: add tlast_change_over_time(m[d]) function, which returns the timestamp for the last change of m on the given lookbehind window d	2022-04-27 10:59:03 +03:00
Aliaksandr Valialkin	25fe83577d	app/vmselect/promql: properly handle scalar default vector, scalar if vector and scalar ifnot vector queries ... Previously `vector` time series could be unexpectedly returned from such queries	2022-04-21 15:34:36 +03:00
Aliaksandr Valialkin	d1a9fac894	app/vmselect/promql: fix comparison to nan ... The comparison to nan has been broken in d335cc886c Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/150	2022-04-21 14:55:37 +03:00
Aliaksandr Valialkin	de892239a9	app/vmselect/promql: add drop_common_labels() function	2022-04-21 14:20:20 +03:00
Aliaksandr Valialkin	7a44ba1234	app/vmselect/promql: fix q default b where b may have empty time series	2022-04-21 11:42:42 +03:00
Aliaksandr Valialkin	d335cc886c	app/vmselect/promql: fix duplicate time series error on joins against time series filtered by values ... This should prevent from `duplicate time series` errors when executing the following query: kube_pod_container_resource_requests{resource="cpu"} * on (namespace,pod) group_left() (kube_pod_status_phase{phase=~"Pending|Running"}==1) where `kube_pod_status_phase{phase=~"Pending|Running"}==1` filters out diplicate time series	2022-04-20 22:18:44 +03:00
Aliaksandr Valialkin	ed97908ca9	app/vmselect/promql: rename removeNaNs() to more clear removeEmptySeries()	2022-04-20 19:53:46 +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	6e364e19ef	app/vmselect: add fine-grained limits for the number of returned/scanned time series for various APIs	2022-03-26 11:29:49 +02:00
Aliaksandr Valialkin	0d47c23a03	app/vmselect/promql: reduce the maximum number of label values, which can be propagated from one side of the binary operation to another side of the binary operation from 10K to 1K ... There are user reports that 10K unique values in a single label filter may lead to performance and memory usage issues	2022-02-24 04:05:18 +02:00
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	b1f94f7f0e	app/vmselect/promql: return at most one time series from absent_over_time() in the same way as Prometheus does ... See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2130	2022-02-12 15:45:09 +02:00
Aliaksandr Valialkin	96b7de6736	app/vmselect/promql: clarify comments on why the right side of if and and operators are executed at first	2022-02-03 00:26:14 +02:00
Aliaksandr Valialkin	4b850c2a59	app/vmselect/promql: do not push down filters, which enumerate more than 10k unique values ... Such filters may slow down time series search, so just skip them. This is a follow-up for e7f1ceeb84 Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1827	2022-02-02 23:40:02 +02:00
Aliaksandr Valialkin	2016a2c899	app/vmselect/promql: properly handle foo or bar queries ... Such queries may miss `bar` results after the commit e7f1ceeb84 because common label filters from `foo` could be mistakenly applied to `bar`.	2022-02-01 17:40:51 +02:00
Aliaksandr Valialkin	4bdd10ab90	lib/bytesutil: split Resize* funcs to MayOverallocate and NoOverallocate for more fine-grained control over memory allocations ... Follow-up for f4989edd96 Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007	2022-02-01 00:18:42 +02:00
Aliaksandr Valialkin	a8d22e1223	app/vmselect/promql: check for binary operation in case-insensitive manner when deciding which side of the operation to perform the first ... PromQL and MetricsQL operators are case-insensitive	2022-01-31 22:06:15 +02:00
Aliaksandr Valialkin	e7f1ceeb84	app/vmselect/promql: optimize queries, which join on _info metrics. ... Automatically add common filters from one side of binary operation to the other side before sending the query to storage subsystem. See https://grafana.com/blog/2021/08/04/how-to-use-promql-joins-for-more-effective-queries-of-prometheus-metrics-at-scale/ and https://www.robustperception.io/exposing-the-software-version-to-prometheus	2022-01-31 19:32:36 +02:00
Aliaksandr Valialkin	f4989edd96	lib/bytesutil: split Resize() into ResizeNoCopy() and ResizeWithCopy() functions ... Previously bytesutil.Resize() was copying the original byte slice contents to a newly allocated slice. This wasted CPU cycles and memory bandwidth in some places, where the original slice contents wasn't needed after slize resizing. Switch such places to bytesutil.ResizeNoCopy(). Rename the original bytesutil.Resize() function to bytesutil.ResizeWithCopy() for the sake of improved readability. Additionally, allocate new slice with `make()` instead of `append()`. This guarantees that the capacity of the allocated slice exactly matches the requested size. The `append()` could return a slice with bigger capacity as an optimization for further `append()` calls. This could result in excess memory usage when the returned byte slice was cached (for instance, in lib/blockcache). Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007	2022-01-25 15:24:44 +02:00
Aliaksandr Valialkin	dc7b63a793	app/vmselect/promql: properly keep metric names when optimized path is used for aggregate function calculations ... For example, `sum(rate(...) keep_metric_names) by (__name__)` didn't leave the original metric name because of this issue. This is a follup-up for 1bdc71d917 Udates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/949	2022-01-17 15:30:30 +02:00
Aliaksandr Valialkin	1bdc71d917	app/vmselect/promql: implement keep_metric_names modifier for transform and rollup functions ... Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/949	2022-01-14 04:14:59 +02:00
Aliaksandr Valialkin	f41846d002	app/vmselect/promql: add stale_samples_over_time() function	2022-01-14 01:48:04 +02:00
Aliaksandr Valialkin	c883c15878	app/vmselect/promql: add support for @ modifier ... Add support for `@` modifier in MetricsQL according to https://prometheus.io/docs/prometheus/latest/querying/basics/#modifier Extend the support with the following features: * Allow using `@` modifier everywhere in the query. For example, `sum(foo) @ end()` * Allow using arbitrary expression as `@` modifier. For example, `foo @ (end() - 1h)` returns `foo` value at `end - 1 hour` timestamp on the selected time range `[start ... end]` Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1348	2022-01-13 22:12:06 +02:00
Aliaksandr Valialkin	9469696e46	app/vmselect/promql: fix limit_offset() test ... The test has been broken in addae7fc6a	2022-01-13 16:59:28 +02:00
Aliaksandr Valialkin	974d9c0eee	app/vmselect/promql: follow-up after 177e345d8a ... * Document changes_prometheus(), increase_prometheus() and delta_prometheus() functions. * Simplify their implementation * Mention these functions in docs/CHANGELOG.md	2021-12-20 13:19:44 +02:00
匠心零度	177e345d8a	add Prometheus semantics function :changes_prometheus、delta_prometheus、increase_prometheus (#1972) ... Co-authored-by: lirenzuo <lirenzuo@shein.com>	2021-12-20 12:32:43 +02:00
Aliaksandr Valialkin	5efe377a26	app/vmselect/promql: add timestamp_with_name(m[d]) function ... This function works the same as `timestamp()`, but doesn't remove source time series names. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/949#issuecomment-995222388	2021-12-15 23:37:07 +02:00
Aliaksandr Valialkin	d1f8915ed1	app/vmselect/promql: preserve the order of time series passed to limit_offset() function ... Previously time series passed to `limit_offset()` were shuffled according to hash for their labels. This was unexpected behaviour for most users. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1920 and https://github.com/VictoriaMetrics/VictoriaMetrics/issues/951	2021-12-12 18:04:58 +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
Michael Fuller	cf8c171f85	vmselect: in promql evaluation, return bytes requested when rollup memory limiter is unable to satisfy the request (#1838) ... Co-authored-by: Michael Fuller <mfuller@digitalocean.com>	2021-11-22 13:20:42 +03:00
Aliaksandr Valialkin	9bee043ff2	app/vmselect/promql: consistently return zero from deriv(const)	2021-11-17 18:02:05 +02:00
Aliaksandr Valialkin	b900560b83	app/vmselect/promql: add now() function, which returns the current timestamp as a floating-point value in seconds	2021-11-17 16:35:30 +02:00
Aliaksandr Valialkin	f43586c63c	app/vmselect/promql: arrange function names in the code in alphabetical order ... This should simplify code maintenance in the future	2021-11-14 13:55:06 +02:00
Aliaksandr Valialkin	9fa098d8e3	app/vmselect/promql: prevent from incorrect calculations for deriv() over multiple samples with identical timestamps	2021-11-12 13:50:43 +02:00
Aliaksandr Valialkin	840ac283ef	app/vmselect/promql: properly return durations smaller than one second from duration_over_time() function ... Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1780	2021-11-09 11:41:56 +02:00
Aliaksandr Valialkin	3419ac1d36	app/vmselect/promql: add duration_over_time(m[d], max_interval) function ... This function calculates the actual lifetime of the time series on the given lookbehdind window `d` Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1780	2021-11-08 13:14:09 +02:00
Aliaksandr Valialkin	27044b84d2	app/vmselect/promql: add limit_offset(limit, offset, q) function, which can be used for paging over big number of time series ... Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1778	2021-11-03 16:02:27 +02:00
Aliaksandr Valialkin	43a58bd618	app/vmselect/promql: add label_graphite_group() function for extracting groups from Graphite metric names	2021-11-03 13:19:08 +02:00
Aliaksandr Valialkin	1952ab99aa	all: fix build issues and tests for Apple M1 ... Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1653	2021-10-27 15:06:34 +03:00
Aliaksandr Valialkin	df8f967040	app/vmselect/promql: reduce the precision from 15 significant digits to 13 significant digits when comparing float64 results in tests ... See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1738	2021-10-24 13:31:14 +03:00
Aliaksandr Valialkin	da97e58979	app/vmselect/promql: randomize the static selection of time series returned from limitk() ... Sort series by a hash calculated from the series labels. This should guarantee "random" selection of the returned time series. Previously the selection could be biased, since time series were sorted alphabetically by label names and label values.	2021-10-16 21:16:49 +03:00
Aliaksandr Valialkin	cae174b11c	app/vmselect/promql: typo fix in comment: didsn't -> didn't	2021-10-16 13:00:34 +03:00