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Author SHA1 Message Date
Aliaksandr Valialkin
99ee1c13c0
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 04:03:28 +02:00
Aliaksandr Valialkin
989668beba
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 15:46:43 +02:00
Aliaksandr Valialkin
1173964d8d
app/vmselect/promql: clarify comments on why the right side of if and and operators are executed at first 2022-02-03 00:26:42 +02:00
Aliaksandr Valialkin
10367d7e4c
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 23:42:25 +02:00
Aliaksandr Valialkin
13c2692ca1
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 17:43:10 +02:00
Aliaksandr Valialkin
784cdcb080
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 22:07:35 +02:00
Aliaksandr Valialkin
04d6596298
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 20:25:15 +02:00
Aliaksandr Valialkin
cc76174387
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 15:33:39 +02:00
Aliaksandr Valialkin
5a1e4a140f
app/vmselect/promql: implement keep_metric_names modifier for transform and rollup functions 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/949
 2022-01-14 04:15:35 +02:00
Aliaksandr Valialkin
53c9a81f2b
app/vmselect/promql: add stale_samples_over_time() function 2022-01-14 01:49:24 +02:00
Aliaksandr Valialkin
0580a58feb
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 22:15:19 +02:00
Aliaksandr Valialkin
54d4a1c959
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 17:33:49 +02:00
Michael Fuller
8a94dd36d1
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>
 2021-11-29 12:14:55 +02:00
Aliaksandr Valialkin
76c650bbda app/vmselect/promql: add quantiles_over_time("phiLabel", phi1, ..., phiN, m[d]) function for calculating multiple quantiles at once 2021-09-17 23:35:04 +03:00
Aliaksandr Valialkin
5d92fafc40 app/vmselect: add -search.noStaleMarkers command-line flag for disabling stale markers handling in queries 
This option allows reducing CPU usage a bit when VictoriaMetrics is used
for collecting and processing non-Prometheus data. For example, InfluxDB line protocol, Graphite, OpenTSDB, CSV, etc.
 2021-08-18 13:58:06 +03:00
Aliaksandr Valialkin
38065bec7b app/vmselect/promql: move common condition to dropStaleNaNs in order to improve code maintainability 2021-08-17 11:00:58 +03:00
Aliaksandr Valialkin
5420c3d967 app/vmselect/promql: drop staleness marks before calling rollupConfig.Do 
This allows dropping staleness marks only once and then calculate multiple rollup functions on the result.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1526
 2021-08-15 13:22:26 +03:00
Aliaksandr Valialkin
9add9d86a6 app/vmselect/promql: duration handling improvements in MetricsQL queries 
- Support durations anywhere in MetricsQL queries. E.g. sum_over_time(m[1h])/1h is equivalent to sum_over_time(m[1h])/3600
- Support durations without suffix. E.g. rate(m[300]) is equivalent to rate(m[5m])
 2021-07-12 17:19:32 +03:00
Aliaksandr Valialkin
56b08390f6 app/vmselect/promql: allow to use 2x more memory for query processing in cluster mode compared to single-node mode 
`vmselect` has no `vmstorage`-related caches. So it can use more memory for query processing compared to single-node VictoriaMetrics.
 2021-05-12 14:43:49 +03:00
Aliaksandr Valialkin
7f9863254d app/vmselect: improve description for -search.maxPointsPerTimeseries command-line flag 2021-03-22 16:44:36 +02:00
Aliaksandr Valialkin
6b9bba7448 app/vmselect: add round_digits query arg to /api/v1/query and /api/v1/query_range handlers for limiting the number of decimal digits after the point 2021-03-15 12:38:59 +02:00
Aliaksandr Valialkin
54d2f67924 app/vmselect/promql: properly make copies of EvalConfig 2021-02-11 12:41:37 +02:00
Aliaksandr Valialkin
5973fd4067 app/vmselect/promql: make a copy of EvalConfig when executing q1 and q2 in parallel for q1 binary_op q2 
This should prevent from data races if the underlying functions modify EvalConfig contents.
 2021-02-10 23:06:58 +02:00
Aliaksandr Valialkin
985c3e301d app/vmselect: parallelize q1 <binary_op> q2 queries by running q1 and q2 in parallel 
This should reduce query execution times.
 2021-02-10 23:00:56 +02:00
Aliaksandr Valialkin
7d23f3ff3a app/vmselect: add ability to set an additional label filters via extra_label query arg 2021-02-01 17:42:35 +02:00
Aliaksandr Valialkin
44c74f1e79 app/vmselect/promql: improve documentation for -search.maxPointsPertimeseries command-line flag 
This should reduce incorrect usage and assumptions for this flag.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1020
 2021-01-22 13:00:35 +02:00
Aliaksandr Valialkin
47872ada7e app/vmselect/promql: do not ajdust offset value provided in the query 
Previously it could be modified in order to improve response cache hit ratio.
This is unneeded, since cache hit ratio should remain good because the query time range
should be already aligned to multiple of `step` values.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/976
 2020-12-27 14:10:15 +02:00
Aliaksandr Valialkin
1a237c6903 all: properly handle CPU limits set on the host system/container 
This can reduce memory usage on systems with enabled CPU limits.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/946
 2020-12-08 21:07:03 +02:00
Aliaksandr Valialkin
7d76fdedcc app/vmselect: use storage.NewSearchQuery() instead of constructing storage.SearchQuery in-place 
This should prevent from bugs when AccountID and ProjectID aren't set in storage.SearchQuery.
 2020-11-16 18:04:33 +02:00
Aliaksandr Valialkin
2ac5f00d98 app/vmselect: propagate errors from vmstorage to response to the client if -search.denyPartialResponse command-line flag is set 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/891

This commit also adds `"isPartial":{true|false}` field to `/api/v1/*` responses. `"isPartial":true` is set when the response
is based on a partial data because some of vmstorage nodes weren't available during query processing.
 2020-11-14 13:20:10 +02:00
Aliaksandr Valialkin
db14f22fc0 app/vmselect: stop /api/v1/export/* execution if client disconnects 2020-09-27 23:52:42 +03:00
Aliaksandr Valialkin
d3ad0d365e app/vmselect: move Deadline from netstorage to searchutils 
This removes dependency on netstorage from searchutils.
 2020-09-11 13:39:13 +03:00
Aliaksandr Valialkin
db91045348 app/vmselect/promql: increase floating point calculations accuracy by dividing by 1e3 instead of multiplying by 1e-3 2020-09-08 14:01:02 +03:00
Aliaksandr Valialkin
804304c365 app/vmselect: add missing deletion for temporary files on partial responses when -search.denyPartialResponse=true 2020-09-04 02:23:12 +03:00
Aliaksandr Valialkin
3490160fd0 app/vmselect: unconditionally align time range boundaries to step for subqueries as Prometheus does 2020-09-03 13:22:06 +03:00
Aliaksandr Valialkin
a2aa3a60eb app/vmselect: show X-Forwarded-For contents on /api/v1/status/active_queries page 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/659
 2020-07-31 20:01:09 +03:00
Aliaksandr Valialkin
0c00fe70cf 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 23:14:56 +03:00
Aliaksandr Valialkin
0f6f0d30d3 app/vmselect: show query origin (aka remote_addr or client address) on the /api/v1/status/active_queries page for every query 2020-07-28 15:14:40 +03:00
Aliaksandr Valialkin
71eba8dcf5 app/vmselect: log the total available memory for concurrent requests on not enough memory errors 
This should simplify root cause analysis
 2020-07-20 19:51:58 +03:00
Aliaksandr Valialkin
d962568e93 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 23:33:46 +03:00
Aliaksandr Valialkin
81b8811cf4 app/vmselect/promql: remove -search.maxPointsPerTimeseries command-line flag 
Limit the estimated time series count after aggregation with grouping by the number of source time series.
 2020-05-12 19:54:44 +03:00
Aliaksandr Valialkin
21c2982ac8 app/vmselect/promql: support for sum(x) by (y) limit N syntax in order to limit the number of output time series after aggregation 2020-05-12 19:50:12 +03:00
Aliaksandr Valialkin
f341c6fcc4 Revert "app/vmselect: add -search.estimatedSeriesCountAfterAggregation command-line flag for tuning the probability of OOMs or false-positive not enough memory errors" 
This reverts commit fbb7986dd2380fce2fc8633b7eda8b67f419e74c.

Reason for revert: this commit has been removed from single-node version
 2020-05-12 19:50:08 +03:00
Aliaksandr Valialkin
9ed4951ec8 lib/metricsql: move it to a separate repository - github.com/VictoriaMetrics/metrics 2020-04-28 15:30:06 +03:00
Aliaksandr Valialkin
cd1145e5f4 app/vmselect: add -search.estimatedSeriesCountAfterAggregation command-line flag for tuning the probability of OOMs or false-positive not enough memory errors 2020-04-28 12:51:48 +03:00
Aliaksandr Valialkin
4a1de7fee9 app/vmselect/promql: properly adjust time range for data to select 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/309
 2020-02-05 21:23:43 +02:00
Aliaksandr Valialkin
8e77b54846 app/vmselect: unconditionally offset -step to rollup_candlestick. This makes results more consistent 2020-02-04 23:31:47 +02:00
Aliaksandr Valialkin
ce38b176bc app/vmselect/promql: automatically apply offset -step to rollup_candlestick function in order to obtain the expected OHLC results 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/309
 2020-02-04 23:24:04 +02:00
Aliaksandr Valialkin
ce0b602405 app/vmselect/promql: fix panic on sum(aggr_over_time(...)) with incorrect number of args 2020-01-15 16:26:16 +02:00
Aliaksandr Valialkin
bcd3f0c5bd app/vmselect/promql: add hoeffding_bound_upper(phi, m[d]) and hoeffding_bound_lower(phi, m[d]) functions 
These functions can be used for calculating Hoeffding bounds
for `m` over `d` time range and for the given `phi` in the range `[0..1]`.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/283
 2020-01-11 14:47:13 +02:00