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Author SHA1 Message Date
Aliaksandr Valialkin
938ff7bba6
app/vmselect: allow limiting per-query memory usage via -search.maxMemoryPerQuery command-line flag 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3203
 2022-10-08 01:14:01 +03:00
Aliaksandr Valialkin
b05ff477c8
app/vmselect/promql: properly calculate vm_rows_scanned_per_query histogram for rollup functions, which take into account only a few samples on the provided lookbehind window 2022-10-06 23:23:17 +03:00
Aliaksandr Valialkin
baa11a778d
app/vmselect/promql: properly calculate quantiles_over_time() over a single raw sample 2022-10-06 22:37:38 +03:00
Aliaksandr Valialkin
5497997b72
app/vmselect/promql: increase scalability of incremental aggregate calculations on systems with many CPU cores 
Use sync.Map instead of a global mutex there. This should lift scalability limits
on systems with many CPU cores.
 2022-10-01 20:14:14 +03:00
Aliaksandr Valialkin
98175493d7
app/vmselect/promql: remove empty series before applying aggregate function 
Previously empty series (e.g. series with all NaN samples) were passed to aggregate functions.
Such series must be ingored by all the aggregate functions.
So it is better from consistency PoV filtering out empty series before applying aggregate functions.
 2022-09-30 08:44:06 +03:00
Roman Khavronenko
273472dc20
app/vmselect: ignore empty series for limit_offset (#3178) 
* app/vmselect: ignore empty series for `limit_offset`

VictoriaMetrics doesn't return empty series (with all NaN values) to
the user. But such series are filtered after transform functions.
It means `limit_offset` will account for empty series as well.

For example, let's consider following data set:
```
time series:
foo{label="1"} NaN, NaN, NaN, NaN // empty series
foo{label="2"} 1, 2, 3, 4
foo{label="3"} 4, 3, 2, 1
```

When user requests all series for metric `foo` the empty series
will be filtered out:
```
/query=foo:
foo{label="v2"} 1, 2, 3, 4
foo{label="v3"} 4, 3, 2, 1
```

But `limit_offset(1, 1, foo)` is applied to original series, not filtered yet.
So it will return `foo{label="v2"}` (skips the first in list)
```
/query=limit_offset(1, 1, foo):
foo{label="v2"} 1, 2, 3, 4
```

Expected result would be to apply `limit_offset` to already filtered list,
so in result we receive `foo{label="v3"}`:
```
/query=limit_offset(1, 1, foo):
foo{label="v3"} 4, 3, 2, 1
```

The change does exactly that - filters empty series before applying `limit_offset`.

Signed-off-by: hagen1778 <roman@victoriametrics.com>

* app/vmselect: ignore empty series for `limit_offset`

Signed-off-by: hagen1778 <roman@victoriametrics.com>

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2022-09-30 08:44:05 +03:00
Roman Khavronenko
4acbf6e7d4
vmselect/rollup: rm workaround for slow-changing counters (#3163) 
The workaround was introduced to fix https://github.com/VictoriaMetrics/VictoriaMetrics/issues/962.
However, it didn't prove itself useful. Instead, it is recommended using `increase_pure` function.

Removing the workaround makes VM to produce accurate results when calculating
`delta` or `increase` functions over slow-changing counters with vary intervals
between data points.

Signed-off-by: hagen1778 <roman@victoriametrics.com>

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2022-09-26 15:39:49 +03:00
Dmytro Kozlov
36ea8537d9
vmselect/promql: add alphanumeric sort by label (sort_by_label_numeric) (#2982) 
* vmselect/promql: add alphanumeric sort by label (sort_by_label_numeric)

* vmselect/promql: fix tests, add documentation

* vmselect/promql: update test

* vmselect/promql: update for alphanumeric sorting, fix tests

* vmselect/promql: remove comments

* vmselect/promql: cleanup

* vmselect/promql: avoid memory allocations, update functions descriptions

* vmselect/promql: make linter happy (remove ineffectual assigment)

* vmselect/promql: add test case, fix behavior when strings are equal

* vendor: update github.com/VictoriaMetrics/metricsql from v0.44.1 to v0.45.0

this adds support for sort_by_label_numeric and sort_by_label_numeric_desc functions

* wip

* lib/promscrape: read response body into memory in stream parsing mode before parsing it

This reduces scrape duration for targets returning big responses.

The response body was already read into memory in stream parsing mode before this change,
so this commit shouldn't increase memory usage.

* wip

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
 2022-09-14 17:42:07 +03:00
Dmytro Kozlov
96ecec877d
vmselect/{promql, prometheus}: show flag names which user can update in error message (#3049) 
* vmselect/{promql, prometheus}: show flag names which user can update in error message

* vmselect/{promql, prometheus}: fix typo
 2022-09-06 14:48:20 +03:00
Aliaksandr Valialkin
c6b74148cf
app/vmselect/promql: consistently calculate rate_over_sum(m[d]) as sum_over_time(m[d])/d 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3045
 2022-09-02 23:19:05 +03:00
Aliaksandr Valialkin
024e2f18da
app/vmselect/promql: evaluate union() args in parallel in order to increase query performance 
Note that the parallel execution of `union()` args may take more memory and CPU time
than the sequential execution if args contain heavy queries, which may load all the available CPU,
disk and memory resources and vmselect and vmstorage levels.
 2022-09-02 21:01:04 +03:00
Aliaksandr Valialkin
8aaaf221cc
app/vmselect/promql: follow-up after 2d71b4859c 
- Use getScalar() function for obtaining the expected scalar from phi arg
- Reduce the error message returned to the user when incorrect phi is passed to histogram_quantiles
- Improve the description of this bugfix in the docs/CHANGELOG.md

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3026
 2022-08-27 01:38:17 +03:00
Dmytro Kozlov
2cf29cc4d1
vmselect/promql: fix panic in histogram_quantiles function (#3029) 
* vmselect/promql: fix panic in histogram_quantiles function

* Update docs/MetricsQL.md

Co-authored-by: Roman Khavronenko <roman@victoriametrics.com>

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
Co-authored-by: Roman Khavronenko <roman@victoriametrics.com>
 2022-08-27 01:34:54 +03:00
Dmytro Kozlov
d32a6359b0
vmselect/promql: enable search.maxPointsSubqueryPerTimeseries for sub-queries (#2963) 
* vmselect/promql: enable search.maxPointsPerTimeSeriesSubquery for sub-queries

* vmselect/promql: cleanup

* vmselect/promql: rename config flag

* vmselect/promql: add tests

* vmselect/promql: use test object instead of log

* vmselect/promql: fix posible panic is subquery has more points. add description

* vmselect/promql: update tests descriptions

* vmselect/promql: update doInternal validation

* vmselect/promql: fix linter

* vmselect/promql: fix linter

* vmselect/promql: update documentation and release notes

* wip

- Properly apply -search.maxPointsSubqueryPerTimeseries limit to subqueries.
  Previously the -search.maxPointsPerTimeseries limit was unexpectedly applied to subqueries
  if it was smaller than the -search.maxPointsSubqueryPerTimeseries .
- Clarify docs for -search.maxPointsSubqueryPerTimeseries command-line flag .
- Document -search.maxPointsPerTimeseries and -search.maxPointsSubqueryPerTimeseries flags at https://docs.victoriametrics.com/#resource-usage-limits .
- Update docs/CHANGELOG.md .

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2922

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
 2022-08-24 15:27:41 +03:00
Aliaksandr Valialkin
06f6de6d47
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 23:55:20 +03:00
Aliaksandr Valialkin
7d7cf2b6fd
app/vmselect: follow-up after 63e0f16062 
* Explicitly store a pointer to UserReadableError in the error interface.
  Previously Go automatically converted the value to a pointer before storing in the error interface.

* Add Unwrap() method to UserReadableError, so it can be used transparently with the other code,
  which calls errors.Is() and errors.As().

* Document the change in docs/CHANGELOG.md
 2022-08-15 13:53:19 +03:00
Roman Khavronenko
8a26ec435d
vmselect: introduce UserReadableError type of error (#2894) 
When read query fails, VM returns rich error message with
all the details. While these details might be useful
for debugging specific cases, they're usually too verbose
for users.
Introducing a new error type `UserReadableError` is supposed
to allow to return to user only the most important parts
of the error trace. This supposed to improve error readability
in web interfaces such as VMUI or Grafana.

The full error trace is still logged with the full context
and can be found in vmselect logs.

Signed-off-by: hagen1778 <roman@victoriametrics.com>

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2022-08-15 13:53:18 +03:00
Aliaksandr Valialkin
21f588e9cf
app/vmselect/promql: fix TestVmrangeBucketsToLE test after 8516670582 
Remove 'AccountID=0, ProjectID=0, ' prefix for cluster version
 2022-08-07 00:15:10 +03:00
Dmytro Kozlov
ab645b5fab
vmselect/promql: add tests for vmrangeBucketsToLE (#2907) 
* vmselect/promql: add tests for vmrangeBucketsToLE

* vmselect/promql: cleanup

* vmselect/promql: cleanup

* vmselect/promql: fix panic tests want result

* vmselect/promql: cleanup

* vmselect/promql: update test name

* vmselect/promql: fix linter error

* vmselect/promql: refactor testcases

* vmselect/promql: cleanup

* vmselect/promql: remove unused reassign to workers, fix typo

* wip

* wip

* wip

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
 2022-07-26 20:43:43 +03:00
Aliaksandr Valialkin
8a83c59956
app/vmselect/promql: reduce the diff for f148cffc8a 
This is a follow-up for c826f06366
 2022-07-26 19:21:16 +03:00
Alan Liang
f97de473f4
vmselect: fix vmrangeBucketsToLE func may panic when ts value equal zero (#2902) 
Co-authored-by: alanwzliang <alanwzliang@tencent.com>
 2022-07-25 10:49:48 +03:00
Roman Khavronenko
04c4f8bafd
vmselect: return correct error for second part of expression (#2893) 
Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2022-07-21 20:40:47 +03:00
Aliaksandr Valialkin
f992f96a88
app/vmselect/promql: execute q1 and q2 from q1 op q2 in parallel if labels pushdown cannot be applied 
This should improve query performance if VictoriaMetrics has enough resources for processing `q1` and `q2` in parallel.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2886
 2022-07-19 14:29:41 +03:00
Aliaksandr Valialkin
d920b0afec
app/vmselect/promql: properly return q1 series from q1 ifnot q2 when q2 returns nothing 2022-07-18 14:24:23 +03:00
Aliaksandr Valialkin
f933d5f142
app/vmselect/promql/transform.go: reuse evalNumber() function for constructing timezone_offset() results 2022-07-18 14:24:22 +03:00
Aliaksandr Valialkin
919939ee9f
app/vmselect/promql: consistency update after 93fbd0c54b 2022-07-13 12:34:28 +03:00
Roman Khavronenko
214e01499c
promql: return step as scrapeInterval when it can't be calculated (#2865) 
The change allows to specify default value for `getScrapeInterval`
function when actual interval can't be calculated.

Before the change, function were returning `maxSilenceInterval` (5m)
in such cases, which may be not correct for instant queries processing.
The specific scenario where using `maxSilenceInterval` caused issues
is the following:
1. Series becomes stale;
2. Client (in this case vmalert) continues to request series every 15s;
3. Database returns empty results as expected;
4. But at some specific moment of time database returns datapoints from `now()-5m`,
because lookback window was extended to `maxSilenceInterval`.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2022-07-13 12:34:28 +03:00
Aliaksandr Valialkin
5867708b3d
app/vmselect/promql: validate function name before evaluating its arguments 
This avoids unneeded evaluation of args for unknown functions
 2022-07-12 19:49:54 +03:00
Roman Khavronenko
78da074ad3
metricsql: properly evaluate timezone_offset over time interval (#2842) 
* metricsql: properly evaluate `timezone_offset` over time interval

https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2771
Signed-off-by: hagen1778 <roman@victoriametrics.com>

* Update docs/CHANGELOG.md

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
 2022-07-08 14:04:40 +03:00
Aliaksandr Valialkin
f4df43f7cc
app/vmselect/netstorage: remove unused auth.Token arg 2022-07-06 12:46:21 +03:00
Aliaksandr Valialkin
10c63f5853
app/vmselect: make fmt after f3ece83e67 2022-07-05 14:56:53 +03:00
Aliaksandr Valialkin
8516670582
app/vmselect/promql: properly calculate histogram_quantile over unexpected le buckets 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2819
 2022-07-05 13:20:41 +03:00
Aliaksandr Valialkin
fa08220d27
app/vmselect/promql: properly handle partial counter resets in rate(), irate(), increase() and remove_resets() functions 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2787
 2022-06-30 22:40:26 +03:00
Aliaksandr Valialkin
4fb0f15322
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 18:19:43 +03:00
Aliaksandr Valialkin
daefb64f38
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 20:18:31 +03:00
Aliaksandr Valialkin
9adff0b686
app/vmselect/promql: show the number of scanned samples in the query trace 2022-06-28 19:32:03 +03:00
Aliaksandr Valialkin
399d4c36ae
app/vmselect: optimize /api/v1/series a bit for time ranges smaller than one day 2022-06-28 12:55:20 +03:00
Aliaksandr Valialkin
6386f117c8
all: show timeRange in traces in human-readable format instead of timestamps in milliseconds 2022-06-27 13:42:57 +03:00
Aliaksandr Valialkin
fe2269b999
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 20:24:28 +03:00
Aliaksandr Valialkin
a9ea3fee38
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 21:16:12 +03:00
Aliaksandr Valialkin
afced37c0b
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 02:31:44 +03:00
Aliaksandr Valialkin
68bfa05437
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 17:58:39 +03:00
Aliaksandr Valialkin
6eb1580158
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 10:58:40 +03:00
Aliaksandr Valialkin
dac24aa342
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 15:34:14 +03:00
Aliaksandr Valialkin
bc54ae9608
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 14:56:41 +03:00
Aliaksandr Valialkin
a5cfe5d13e
app/vmselect/promql: add drop_common_labels() function 2022-04-21 14:20:36 +03:00
Aliaksandr Valialkin
7ca08945fd
app/vmselect/promql: fix q default b where b may have empty time series 2022-04-21 11:43:09 +03:00
Aliaksandr Valialkin
25b841c6ed
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 22:21:20 +03:00
Aliaksandr Valialkin
0ef7a05fc0
app/vmselect/promql: rename removeNaNs() to more clear removeEmptySeries() 2022-04-20 19:53:24 +03:00
Aliaksandr Valialkin
3605e1743b
app/vmselect/promql: allow calling InitRollupResultCache+StopRollupResultCache multiple times during tests 2022-04-11 12:32:23 +03:00
Aliaksandr Valialkin
b843f0e229
app/vmselect: add fine-grained limits for the number of returned/scanned time series for various APIs 2022-03-26 11:28:14 +02:00
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
244c23ea2c
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 13:42:27 +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
02b2bfcff3
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 11:20:20 +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
6232eaa938
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 15:28:42 +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
7d635a2311
app/vmselect/promql: fix limit_offset() test 
The test has been broken in addae7fc6a
 2022-01-13 16:58:47 +02:00
Aliaksandr Valialkin
3396f08874
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 13:15:06 +02:00
匠心零度
cc4725843b
add Prometheus semantics function :changes_prometheus、delta_prometheus、increase_prometheus (#1972) 
Co-authored-by: lirenzuo <lirenzuo@shein.com>
 2021-12-20 13:15:05 +02:00
Aliaksandr Valialkin
c170841951
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 23:38:09 +02:00
Aliaksandr Valialkin
addae7fc6a
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 18:07:15 +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
84decc4254
app/vmselect/promql: consistently return zero from deriv(const) 2021-11-17 18:01:58 +02:00
Aliaksandr Valialkin
aa6d11a33f
app/vmselect/promql: add now() function, which returns the current timestamp as a floating-point value in seconds 2021-11-17 16:42:11 +02:00
Aliaksandr Valialkin
1eb756fd11
app/vmselect/promql: arrange function names in the code in alphabetical order 
This should simplify code maintenance in the future
 2021-11-14 13:54:43 +02:00
Aliaksandr Valialkin
82cf9f26db
app/vmselect/promql: prevent from incorrect calculations for deriv() over multiple samples with identical timestamps 2021-11-12 13:53:30 +02:00
Aliaksandr Valialkin
31486f2244
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 11:42:43 +02:00
Aliaksandr Valialkin
3a1ac218ba
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 13:14:57 +02:00
Aliaksandr Valialkin
a102fca4ac
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 16:03:10 +02:00
Aliaksandr Valialkin
43bf0333eb
app/vmselect/promql: add label_graphite_group() function for extracting groups from Graphite metric names 2021-11-03 13:20:34 +02:00
Aliaksandr Valialkin
99784b21c1
all: fix build issues and tests for Apple M1 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1653
 2021-10-27 15:07:19 +03:00
Aliaksandr Valialkin
d8ce86d685
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 13:32:25 +03:00
Aliaksandr Valialkin
ed994873fd
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 21:16:34 +03:00
Aliaksandr Valialkin
da0adf446d
app/vmselect/promql: typo fix in comment: didsn't -> didn't 2021-10-16 13:00:10 +03:00
Aliaksandr Valialkin
48c3668b3d
app/vmselect/promql: add atan2 binary operator, which is going to be added in Prometheus 2.31 
See https://github.com/prometheus/prometheus/pull/9248
 2021-10-11 21:17:23 +03:00
Aliaksandr Valialkin
b3d28f3872
app/vmselect/promql: add missing trigonometric functions, which are going to be added in Prometheus 2.31 
See https://github.com/prometheus/prometheus/issues/9233
 2021-10-11 21:17:21 +03:00
Aliaksandr Valialkin
f1e1d20ac4
app/vmselect/promql: consistently return the same set of time series from limitk() function 
This is the expected behaviour by most users.
 2021-10-08 19:55:29 +03:00
Aliaksandr Valialkin
cbf01f7384
app/vmselect/promql: substitute rollupFuncsCannotAdjustWindow with rollupFuncsCanAdjustWindow 
The list of functions, which can adjust lookbehind window is more limited than the rest of functions,
so it is better from maintainability and readability PoV using the allowlist instead of blocklist.
 2021-10-07 13:19:22 +03:00
Aliaksandr Valialkin
7e6ec0bbe9
app/vmselect/promql: return back the behaviour for deriv() function when the lookbehind window doesnt contain enough points 
It is expected that the `deriv(m[d])` returns non-empty value if the lookbehind window `d`
contains less than 2 samples in the same way as `rate()` does.

This is a follow-up after 3e084be06b .
 2021-10-07 12:55:58 +03:00
Roman Khavronenko
0a8804d6aa
app/vmselect: make predict_linear and deriv compatible with Prometheus (#1681) 
Previously, `predict_linear` returned slightly different results comparing
to Prometheus. The change makes linear regression algorithm compatible
with Prometheus.

`deriv` was excluded from the list of functions which can adjust the time
window for the same reasons.
 2021-10-07 12:55:56 +03:00
Aliaksandr Valialkin
ec6eb03d65
app/vmselect/promql: add topk_last and bottomk_last functions 2021-09-30 13:23:27 +03:00
Roman Khavronenko
95ddfda894
app/vmselect: fix binary comparison func (#1667) 
The fix makes the binary comparison func to check for NaNs
before executing the actual comparison. This prevents VM
to return values for non-existing samples for expressions
which contain bool comparisons. Please see added test
for example.
 2021-09-30 13:04:10 +03:00
Roman Khavronenko
57eb5ef194
app/vmselect: fix testRowsEqual func NaN checks (#1666) 
It appeared, that `testRowsEqual` NaN comparison was incorrect.
The fix caused some tests to fail. Please see the change and
tests updated.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2021-09-30 13:04:08 +03:00
Roman Khavronenko
444a8882f4
app/vmselect: disable time-window adjustment for min/max_over_time funcs (#1658) 
Adjustment results into discrepancy between Prometheus and VM on time windows
smaller than scrape interval.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2021-09-29 00:43:54 +03:00
Roman Khavronenko
f46f847531
app/vmselect: always return zero for stddev func if there is only one value (#1659) 
The fix will always return zero if received set of items consists of one
element only, which also means no deviation.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2021-09-29 00:42:19 +03:00
Roman Khavronenko
72468c9d75
app/vmselect: return NaN instead of 0 for empty value sets (#1660) 
The change affects `count/stddev/stdvar_over_time` funcs and makes
them to return NaN instead of zero when there is no datapoints
in a time window.
This is needed for improving compatibility with Prometheus.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2021-09-29 00:38:24 +03:00
Roman Khavronenko
c8ac8f44b2
app/vmselect: rm quantile_over_time fast-path optimisations (#1662) 
The removed fast path optimisations weren't consistent with
`quantile` function behavior and results into discrepancy.
Specifically, results didn't match in cases when:
* 0 < phi > 1;
* values contain only one element.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2021-09-29 00:35:59 +03:00
Aliaksandr Valialkin
4b3951fd86
app/vmselect/promql: add rollup_scrape_interval(m[d]) function 
It calculates the min, max and avg scrape intervals for m over the given lookbehind window d
 2021-09-27 19:21:55 +03:00
Aliaksandr Valialkin
eff31c10ec
app/vmselect/promql: follow-up after 526dd93b32 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1625
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1612
 2021-09-27 18:57:03 +03:00
Roman Khavronenko
6061464d80
app/vmselect: quantile func compatiblity with Prometheus (#1646) 
* app/vmselect: `quantile` func compatiblity with Prometheus

The `quantile` func was previously calculated by https://github.com/valyala/histogram
package. The result of such calculation was always the closest real value to
requested quantile. While in Prometheus implementation interpolation is used.
Such difference may result into discrepancy in output between Prometheus and
VictoriaMetrics.

This commit adds a Prometheus-like `quantile` function. It also used by other
functions which depend on it, such as `quantiles`, `quantile_over_time`, `median` etc.

https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1625

Signed-off-by: hagen1778 <roman@victoriametrics.com>

* app/vmselect: `quantile` review fixes

* quantile functions were split into multiple to provide
different API for already sorted data;
* float64sPool is used for reducing allocations. Items in pool may have
different sizes, but defining a new pool was complicates due to name collisions;

Signed-off-by: hagen1778 <roman@victoriametrics.com>
 2021-09-27 18:57:02 +03:00
Aliaksandr Valialkin
a746fe8778
app/vmselect/promql: follow-up after 57b3320478 2021-09-24 01:25:04 +03:00
Roman Khavronenko
7ac0559d4f
app/vmselect: make sorting for query result similar to Prometheus (#1647) 
* app/vmselect: make sorting for query result similar to Prometheus

Updated sorting allows to get the order of series in result similar or equal
to what Prometheus returns.
The change is needed for compatibility reasons.

* Update app/vmselect/promql/exec_test.go

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
 2021-09-24 01:25:03 +03:00
Aliaksandr Valialkin
1115c2f235
app/vmselect/promql: align the behavior of or, and and unless operators with on (labels) modifier to Prometheus 
Previously VictoriaMetrics could return unexpected result of the right-hand side operand
had multiple time series with the given set of labels mentioned in `on(labels)`.

See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1643
 2021-09-24 00:56:35 +03:00
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
81d24045c2 app/vmselect/promql: add histogram_quantiles("phiLabel", phi1, ..., phiN, buckets) function 
This function calculates multiple quantiles over the given buckets at once

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1573
 2021-09-17 13:39:06 +03:00
Aliaksandr Valialkin
4ed7548ced app/vmselect/promql: optimize quantiles() calculation 
Calculate quantiles in one go instead of calculating each quantile individually
 2021-09-17 12:38:21 +03:00
Aliaksandr Valialkin
3f8de4f82f app/vmselect/promql: add mad(q) and outliers_mad(tolerance, q) functions to MetricsQL 2021-09-16 13:35:38 +03:00
Aliaksandr Valialkin
19516aedb5 app/vmselect/promql: use Prometheus-compatible label value formatting for count_values function 2021-09-13 13:48:18 +03:00
Aliaksandr Valialkin
9b07cb2988 app/vmselect/promql: keep metric name in rollup_candlestick results, since they don't change the original series meaning 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1600
 2021-09-09 19:24:10 +03:00
Aliaksandr Valialkin
39bb6bdd79 app/vmselect/promql: add quantile("phiLabel", phi1, ..., phiN, q) aggregate function to MetricsQL 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1573
 2021-08-27 18:40:25 +03:00
Aliaksandr Valialkin
335de30083 app/vmselect/promql: make fmt after 0078486ea7 2021-08-23 23:05:34 +03:00
Aliaksandr Valialkin
40b06e84f8 app/vmselect/promql: rename sign() function to sgn() in order to be consistent with Prometheus 
See https://github.com/prometheus/prometheus/pull/8457 for details.
 2021-08-23 11:46:29 +03:00
Aliaksandr Valialkin
91534057a3 app/vmselect/prometheus: do not extend [d] to the detected interval between samples for first_over_time(m[d]) 
This is for the sake of consistency with similar change for the last_over_time(m[d]) at a724229b5d
 2021-08-21 19:56:56 +03:00
Aliaksandr Valialkin
ee1f3414d1 app/vmselect/promql: do not override [d] at last_over_time(m[d]) if [d] is smaller than scrape_interval 
Since most users do not expect the overriding of explicitly set `[d]`.
 2021-08-19 10:33:10 +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
49886ecbc8 app/vmselect/promql: add bitmap_and(), bitmap_or() and bitmap_xor() functions to MetricsQL 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1541
 2021-08-17 13:22:15 +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
6c4c54eaad Revert "app/vmselect/promql: properly handle Prometheus staleness marks in removeCounterResets functions" 
This reverts commit 94dfcb6747a3b29a11d14e71bea21a2312bb6346.

It is better to remove staleness marks (decimal.StaleNaN) before calling rollupConfig.Do, e.g. in preFunc
 2021-08-15 13:22:24 +03:00
Aliaksandr Valialkin
af4a306d7b app/vmselect/promql: properly handle Prometheus staleness marks in removeCounterResets functions 
Prometheus stalenss marks shouldn't be changed in removeCounterResets. Otherwise they will be converted to an ordinary NaN values,
which couldn't be removed in dropStaleNaNs() function later. This may result in incorrect calculations for rollup functions.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1526
 2021-08-14 12:45:31 +03:00
Aliaksandr Valialkin
c1f81f08d4 all: add support for Prometheus staleness markers 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1526
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/748
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1509
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1530
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/845
 2021-08-13 12:13:15 +03:00
Aliaksandr Valialkin
60cfa5f100 app/vmselect/promql: add present_over_time(m[d]) function, which will be available starting from Prometheus 2.29.0 
See https://github.com/prometheus/prometheus/releases/tag/v2.29.0-rc.0 and https://github.com/prometheus/prometheus/pull/9097
 2021-08-03 12:21:53 +03:00
Aliaksandr Valialkin
5d255846ac all: add go:build lines for Go1.17 
See https://tip.golang.org/doc/go1.17#gofmt for more details
 2021-07-26 15:50:46 +03:00
Aliaksandr Valialkin
b047feeb8b app/vmselect/promql: properly handle (a op b) default N if (a op b) returns NaN series 
The result should be a series with `N` values and `a op b` labels. Previously such series has been removed from the result.
 2021-07-16 01:44:24 +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
856aecae05 app/vmselect/promql: return the last timestamp for the max / min value from tmax_over_time() and tmin_over_time() function as most users expect 2021-06-23 14:18:37 +03:00
Aliaksandr Valialkin
b92d110cad app/vmselect: log slow requests to all the /api/v1/* handlers if their execution time exceeds -search.logSlowQueryDuration 2021-06-18 19:07:03 +03:00
Roman Khavronenko
a15c947045 promql: fix increase_pure calculation for cases with stale series (#1381) 
Due to staleness handling, increase_pure were using incorrect previous value
during calculation in cases where series disappears for period longer
than staleness period and then returns back. The fix suppose to account
for a real datapoint value before staleness takes place. The fix should
remove unexpected spikes while using `increase_pure` for staled series.
 2021-06-15 17:37:51 +03:00
John Belmonte
3e79f3994e spelling fix: synonym (#1363) 2021-06-11 10:58:48 +03:00
Aliaksandr Valialkin
e8e7f03394 app/vmselect/promql: typo fix in the comment 2021-06-09 18:34:57 +03:00
Aliaksandr Valialkin
180829b8c2 app/vmselect/promql: add timezone_offset(tz) function 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1306
 2021-05-20 11:54:06 +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
e48fd5776b app/vmselect/promql: fix tests after d3fa0ccabd 2021-04-08 00:17:40 +03:00
Aliaksandr Valialkin
f90bf265f4 app/vmselect/promql: properly detect aggregate topk* and bottomk* aggregate functions in order to disable duplicate sorting 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1189
 2021-04-08 00:10:33 +03:00
Aliaksandr Valialkin
3d5f1f779f app/vmselect: do not sort series returned from topk* and bottomk* functions, since these series are already sorted in user-expected order 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1189
 2021-04-07 14:16:02 +03:00
Aliaksandr Valialkin
4aa59cae7c app/vmselect/promql: do not delete dst_label if src_label is empty in label_copy(q, src_label, dst_label) and label_move(q, src_label, dst_label) 2021-04-03 22:06:50 +03:00
Aliaksandr Valialkin
b9469de410 app/vmselect/promql: add ability to set label value additionally to label name for the remaining sum of time series returned from topk_* and bottomk_* functions in the form: topk_min(N, m, "label=value") 2021-04-02 23:56:30 +03:00
Aliaksandr Valialkin
31d3d02d25 app/vmselect/promql: remove the limit on the number of time series that can be sorted, since it may confuse users 
Always sort time series returned from `/api/v1/query` and `/api/v1/query_range` unless `sort_*` function is used at top level of the query.
 2021-04-02 16:50:02 +03:00
Aliaksandr Valialkin
b473c21915 app/vmselect/promql: do not merge time series during requests to /api/v1/query 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1141
 2021-03-25 13:56:23 +02:00
Aliaksandr Valialkin
7f9863254d app/vmselect: improve description for -search.maxPointsPerTimeseries command-line flag 2021-03-22 16:44:36 +02:00
Aliaksandr Valialkin
92531a38c4 app/vmselect/promql: increment key prefix for faster reset for rollup result cache 2021-03-22 11:59:39 +02:00
Aliaksandr Valialkin
667d129e1e app/vmselect/promql: typo fix after 9666834045 2021-03-17 15:11:54 +02:00
Aliaksandr Valialkin
69201806f8 app/vmselect/promql: merge adjancent buckets with the smallest summary number of hits in buckets_limit() function 
This should improve accuracy for the returned buckets
 2021-03-17 14:31:29 +02:00
Aliaksandr Valialkin
f54ece438d app/vmselect/promql: do not crash if histogram_over_time() function name contains uppercase letters such as Histogram_over_time() 2021-03-16 12:23:55 +02:00
Aliaksandr Valialkin
30ab0eec27 app/vmselect/promql: reduce overhead on scrape interval estimation 
It should be enough to use the first 20 datapoints instead of 100 datapoints for scrape interval estimation.
 2021-03-15 20:32:35 +02:00
Aliaksandr Valialkin
8844b38745 app/vmselect/promql: fix tests after 2dae0a2c47 2021-03-15 20:20:27 +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
942890b1bb app/vmselect/promql: follow up for 433fff0006 2021-03-09 12:54:23 +02:00
Nikolay
28e450cd7c duplicate timeseries fix for prometheus_buckets function (#1119) 
* try fix for prometheus_buckets

* merge possible end of the bucket collision
 2021-03-09 12:54:21 +02:00
Aliaksandr Valialkin
5277507932 app/vmselect/promql: add histogram_avg(), histogram_stddev() and histogram_stdvar() functions to MetricsQL 2021-03-04 14:12:52 +02:00
Nikolay
673b10dd7f adds enforced tag filters into cache key (#1095) 2021-02-27 00:23:38 +02:00
Aliaksandr Valialkin
e38ca28d99 app/vmselect/promql: increase accuracy for buckets_limit() function for small limits by skipping the first and the last buckets during merge 
The first and the last buckets are usually `[0 ... leMin]` and `(leMax ... +Inf)`. If they are merged with adjancent buckets,
then the resulting accuracy can suffer.
 2021-02-26 22:56:04 +02:00
Aliaksandr Valialkin
0144b164c7 app/vmselect: add sign(q) and clamp(q, min, max) functions, which will be added in the upcoming Prometheus release 
See https://twitter.com/roidelapluie/status/1363428376162295811

The `last_over_time(m[d])` function already exists in MetricsQL.
 2021-02-24 17:26:27 +02:00
Aliaksandr Valialkin
d16effc29e app/vmselect/promql: properly calculate histogram_quantile() over zero buckets and only a single non-zero le="+Inf"` bucket like Prometheus does 2021-02-24 00:41:30 +02:00
Aliaksandr Valialkin
5dbe88a1c6 app/vmselect/promql: add increase_pure() function to MetricsQL 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/962
 2021-02-22 19:15:31 +02:00
Aliaksandr Valialkin
bd1d906eee app/vmselect/promql: reduce the probability of duplicate time series errors when querying Kubernetes metrics 2021-02-18 22:08:13 +02:00
Aliaksandr Valialkin
46e98ed490 vendor: update github.com/VictoriaMetrics/metrics from v1.13.1 to v1.14.0 
The new version switches from log-linear histograms to log-based histograms,
which provide up to 3.6 times better accuracy.
 2021-02-15 15:11:15 +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
8de3a329ff app/vmselect: deprecate -search.treatDotsAsIsInRegexps in favor to {__graphite__="foo.*.bar"} syntax 2021-02-03 20:36:42 +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
e55205220b app/vmselect: add -search.maxStepForPointsAdjustment command-line flag, which can be used for disabling adjustment for points returned from /api/v1/query_range handler if they have timestamps closer than -search.latencyOffset to the current time 2021-01-19 22:57:50 +02:00
Aliaksandr Valialkin
c5bdab5a4c app/vmselect/promql: add ability to pass multiple labels to sort_by_label and sort_by_label_desc functions 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/992
 2021-01-13 12:43:47 +02:00
Aliaksandr Valialkin
8cae98aa78 app/vmselect/promql: properly parse escaped multibyte utf8 code sequences in metric names and labels names 
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/990
 2021-01-13 10:59:32 +02:00
Aliaksandr Valialkin
df6e399f73 app/vmselect/promql: add tfirst_over_time(m[d]) and tlast_over_time(m[d]) MetricsQL functions for returning timestamps for the first and the last samples in m over d 2021-01-12 16:12:47 +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
0e739efc88 app/vmselect/promql: simplify defer call for querystats.RegisterQuery 2020-12-27 12:07:56 +02:00
Aliaksandr Valialkin
e6deb39064 app/vmselect: refactor /api/v1/stats/top_queries 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/907
 2020-12-25 17:24:25 +02:00
Nikolay
76d092c091 Adds query stats handler (#945) 
* Adds query stat handler,
for query and query_range api, victoriametrics tracks query execution time,
stats are expored at /api/v1/status/queries endpoint with topN param
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/907

* fixed query stats bugs

* improves queryStats tracker

* improves query stat

* small fix

* fix tests

* added more tests

* fixes 386 tests

* naming fixes

* adds drop for outdated records
 2020-12-25 17:24:24 +02:00
Aliaksandr Valialkin
262cf81757 app/vmselect: properly parse negative combined offsets such as -1h2m3s 
Previously such offsets were parsed as `-1h + 2m + 3s`. Now they are parsed as `-(1h + 2m + 3s)`.
 2020-12-19 01:25:03 +02:00
Aliaksandr Valialkin
8d1031c29a app/vmselect/promql: return expected increase() result for the first point on the graph with value not exceeding 100 2020-12-15 14:10:50 +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
bd8eef2528 app/vmselect/promql: do not reduce lookbehind window for any_rollup_func(m) to -search.maxStalenessInterval. It should equal to step value passed to /api/v1/query_range as most users expect 2020-12-08 15:17:05 +02:00
Aliaksandr Valialkin
d242c2f2bd app/vmselect/promql: add count_eq_over_time(m[d], N) and count_ne_over_time(m[d], N) for calculating the number of samples in m over d that are equal / not equal to N 2020-12-05 12:31:01 +02:00
Aliaksandr Valialkin
8cf76d8747 app/vmselect/promql: add label_uppercase(q, label1, ... labelN) and label_lowercase(q, label1, ... labelN) functions 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/936
 2020-12-03 21:46:18 +02:00
Aliaksandr Valialkin
11bbb3552d app/vmselect/promql: make fmt 2020-12-02 21:34:15 +02:00
Aliaksandr Valialkin
9e98a8f3d3 app/vmselect/promql: return nan from minute(m) when m equals to nan 
This aligns VictoriaMetrics behaviour with Prometheus behaviour.

The issue has been spotted in https://promlabs.com/promql-compliance-test-results/2020-12-01/victoriametrics/
 2020-12-02 20:16:40 +02:00
Aliaksandr Valialkin
def513355e app/vmselect/promql: do not return 0 value from sum_over_time(m[d]) when there are no samples on the given d window. 
This aligns the behaviour of `sum_over_time()` with other `_over_time()` functions and with Prometheus behavior.
 2020-12-02 13:12:33 +02:00
Aliaksandr Valialkin
490c70a958 app/vmselect: return metric values from time() cmp_op metric query when cmp_op comparison is true 
This aligns MetricsQL behavior to Prometheus' one.

The issue has been identified at https://promlabs.com/promql-compliance-test-results/2020-12-01/victoriametrics/
 2020-12-02 12:09:40 +02:00
Aliaksandr Valialkin
4ef7158e89 app/vmselect/promql: return nan from a >bool b if a is nan in the same way as Prometheus does 2020-12-02 00:28:56 +02:00
Aliaksandr Valialkin
e72ccc9239 app/vmselect: add remoteAddr to slow query log in order to improve debuggability 
This will simplify identifying the client that sends slow queries to VictoriaMetrics.
 2020-11-18 20:40:02 +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
8f42e59e05 app/vmselect/promql: remove spikes from increase() and delta() results on time series with spare irregular data points 
Do not take into account spare data point value if the next point will is located too far from the current point.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/894
 2020-11-13 15:23:37 +02:00
Aliaksandr Valialkin
da6d82a8dd app/vmselect/promql: assume that time series value doesnt change during gaps when calculating increase() and delta() 
This should remove unexpected spikes at the end of gaps.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/894
 2020-11-13 14:59:32 +02:00
Aliaksandr Valialkin
4f2c5877db app/vmselect: add -search.treatDotsAsIsInRegexps command-line flag for automatic escaping of dots in regexp label filters 2020-11-11 12:40:28 +02:00
Aliaksandr Valialkin
8f3339fa81 app/vmselect/promql: do not return data points in the end of the selected time range for time series ending in the middle of the selected time range 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/887
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/845
 2020-11-10 14:51:55 +02:00
Aliaksandr Valialkin
6385432611 app/vmselect: typo fix in a description for -search.minStalenessInterval: mimimum->minimum 2020-11-10 01:18:59 +02:00
Aliaksandr Valialkin
efebc3b6fb app/vmselect/promql: code cleanup after 43823addea 2020-11-06 01:31:33 +02:00
n4mine
3127aa92b5 app/vmselect/promql: fix when the parameter of maxValue(), minValue() leading by NaN. it will cause {top,bottom}k_{max,min} return inappropriate result (#883) 2020-11-06 01:31:31 +02:00
Aliaksandr Valialkin
66de02fbb4 app/vmselect/promql: allow dropping trailing sample only for default_rollup function 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/850
 2020-11-02 02:11:06 +02:00
Aliaksandr Valialkin
6b623eba02 app/vmselect/promql: go fmt 2020-11-02 00:18:24 +02:00
Aliaksandr Valialkin
7c0b658865 app/vmselect/promql: do not drop trailing datapoints for instant queries 
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/845
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/748
 2020-11-02 00:12:53 +02:00
Aliaksandr Valialkin
c4464594b7 app/vmselect/promql: allow passing optional third argument to topk_* and bottomk_* functions in order to obtain sum of time series outside top/bottom K 2020-10-20 20:09:55 +03:00
Aliaksandr Valialkin
ee2902ddaf app/vmselect/promql: an attempt to improve heuristics for dropping trailing data points in time series 
Now trailing data points are additionally dropped for time series with a single raw sample

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/748
 2020-10-17 10:44:26 +03:00
Aliaksandr Valialkin
b9a4601c97 app/vmselect/promql: return a single time series at max from absent() function like Prometheus does 2020-10-13 15:56:10 +03:00
Aliaksandr Valialkin
217c192c88 app/vmselect/promql: improve time series staleness detection 
This should prevent from double counting for time series at the time when it changes label.
The most common case is in K8S, which changes pod uid label with each new deployment.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/748
 2020-10-13 12:20:08 +03:00
Aliaksandr Valialkin
f877e703c8 app/vmselect/promql: fix mode_over_time calculations 
Previously `mode_over_time` could return garbage due to improper shuffling of input data points.
 2020-10-13 11:58:30 +03:00