Aliaksandr Valialkin
c4c77aa2dd
app/vmselect/promql: follow-up after 526dd93b32
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1625
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1612
2021-09-27 18:55:39 +03:00
Roman Khavronenko
526dd93b32
app/vmselect: quantile func compatiblity with Prometheus ( #1646 )
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* 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 18:02:41 +03:00
Aliaksandr Valialkin
2951dd0a57
app/vmselect/promql: add histogram_quantiles("phiLabel", phi1, ..., phiN, buckets) function
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This function calculates multiple quantiles over the given buckets at once
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1573
2021-09-17 13:32:39 +03:00
Aliaksandr Valialkin
5ea689d61b
app/vmselect/promql: add quantile("phiLabel", phi1, ..., phiN, q) aggregate function to MetricsQL
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See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1573
2021-08-27 18:37:20 +03:00
Aliaksandr Valialkin
6c5760db9c
app/vmselect/promql: make fmt after 0078486ea7
2021-08-23 23:06:00 +03:00
Aliaksandr Valialkin
0078486ea7
app/vmselect/promql: rename sign() function to sgn() in order to be consistent with Prometheus
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See https://github.com/prometheus/prometheus/pull/8457 for details.
2021-08-23 11:45:51 +03:00
Aliaksandr Valialkin
db1e62495b
app/vmselect/promql: add bitmap_and(), bitmap_or() and bitmap_xor() functions to MetricsQL
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1541
2021-08-17 13:21:21 +03:00
Aliaksandr Valialkin
05672ffc32
app/vmselect/promql: properly handle (a op b) default N if (a op b) returns NaN series
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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 01:44:58 +03:00
John Belmonte
67b17cdd68
spelling fix: synonym ( #1363 )
2021-06-10 08:32:52 +03:00
Aliaksandr Valialkin
0842bb9294
app/vmselect/promql: add timezone_offset(tz) function
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1306
2021-05-20 11:53:09 +03:00
Aliaksandr Valialkin
7a0b964e8d
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 22:05:06 +03:00
Aliaksandr Valialkin
b1713e3fcd
app/vmselect/promql: typo fix after 9666834045
2021-03-17 15:12:11 +02:00
Aliaksandr Valialkin
9666834045
app/vmselect/promql: merge adjancent buckets with the smallest summary number of hits in buckets_limit() function
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This should improve accuracy for the returned buckets
2021-03-17 14:31:41 +02:00
Aliaksandr Valialkin
fe8b12fbad
app/vmselect/promql: follow up for 433fff0006
2021-03-09 12:48:44 +02:00
Nikolay
433fff0006
duplicate timeseries fix for prometheus_buckets function ( #1119 )
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* try fix for prometheus_buckets
* merge possible end of the bucket collision
2021-03-09 12:26:23 +02:00
Aliaksandr Valialkin
a14053ffa0
app/vmselect/promql: add histogram_avg(), histogram_stddev() and histogram_stdvar() functions to MetricsQL
2021-03-04 14:12:07 +02:00
Aliaksandr Valialkin
d86e9b49c4
app/vmselect/promql: increase accuracy for buckets_limit() function for small limits by skipping the first and the last buckets during merge
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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 22:56:36 +02:00
Aliaksandr Valialkin
98854e5f2b
app/vmselect: add sign(q) and clamp(q, min, max) functions, which will be added in the upcoming Prometheus release
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See https://twitter.com/roidelapluie/status/1363428376162295811
The `last_over_time(m[d])` function already exists in MetricsQL.
2021-02-24 17:24:56 +02:00
Aliaksandr Valialkin
f4135b0d14
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 00:42:22 +02:00
Aliaksandr Valialkin
1051d8aa2d
app/vmselect/promql: add ability to pass multiple labels to sort_by_label and sort_by_label_desc functions
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See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/992
2021-01-13 12:44:51 +02:00
Aliaksandr Valialkin
66379cc69f
app/vmselect/promql: add label_uppercase(q, label1, ... labelN) and label_lowercase(q, label1, ... labelN) functions
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/936
2020-12-03 21:47:36 +02:00
Aliaksandr Valialkin
1982505c2b
app/vmselect/promql: return nan from minute(m) when m equals to nan
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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 20:16:58 +02:00
Aliaksandr Valialkin
a2b9476897
app/vmselect/promql: return a single time series at max from absent() function like Prometheus does
2020-10-13 15:56:04 +03:00
Aliaksandr Valialkin
762c967855
app/vmselect/promql: keep metric name after applying more functions, which dont change time series meaning
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Functions are:
* keep_last_value
* keep_next_value
* interpolate
* running_min
* running_max
* running_avg
* range_min
* range_max
* range_avg
* range_first
* range_last
* range_quantile
* smooth_exponential
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/674
2020-10-12 11:47:06 +03:00
Aliaksandr Valialkin
45f7cdc532
Revert "app/vmselect/promql: remove metric name after applying ceil, floor and round functions in order to be more consistent with Prometheus"
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This reverts commit ac45082216https://github.com/VictoriaMetrics/VictoriaMetrics/issues/674
2020-10-12 11:40:34 +03:00
Aliaksandr Valialkin
a94825b169
Revert "app/vmselect/promql: remove metric name after applying clamp_min and clamp_max functions in order to be consistent with Prometheus"
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This reverts commit bb61a4769bhttps://github.com/VictoriaMetrics/VictoriaMetrics/issues/674
2020-10-12 11:38:27 +03:00
Aliaksandr Valialkin
59c26feefa
app/vmselect/promql: fill gaps on graphs for range_* and running_* functions
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/806
2020-10-02 13:59:45 +03:00
Aliaksandr Valialkin
2114179e19
app/vmselect: substitute inf values at smooth_exponential with the previous values
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/757
2020-09-11 12:24:14 +03:00
Aliaksandr Valialkin
204ec415b4
app/vmselect: skip infinite values when calculating smooth_exponential
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/757
2020-09-11 11:29:58 +03:00
Aliaksandr Valialkin
c0343a661b
app/vmselect/promql: increase floating point calculations accuracy by dividing by 1e3 instead of multiplying by 1e-3
2020-09-08 14:00:47 +03:00
Aliaksandr Valialkin
bb61a4769b
app/vmselect/promql: remove metric name after applying clamp_min and clamp_max functions in order to be consistent with Prometheus
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This improves VictoriaMetrics score at https://promlabs.com/promql-compliance-test-results-victoriametrics/
2020-08-06 23:42:37 +03:00
Aliaksandr Valialkin
ac45082216
app/vmselect/promql: remove metric name after applying ceil, floor and round functions in order to be more consistent with Prometheus
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This improves VictoriaMetrics score at https://promlabs.com/promql-compliance-test-results-victoriametrics/
2020-08-06 23:34:37 +03:00
Aliaksandr Valialkin
894dcb7c1c
app/vmselect/promql: improve further the accuracy of buckets_limit() function
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The accuracy is increased by mergin the smallest bucket with the smallest adjacent bucket.
2020-07-26 12:10:13 +03:00
Aliaksandr Valialkin
edb1eca6f1
app/vmselect/promql: avoid dropping inf bucket in buckets_limit
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The `le="inf"` bucket must be preserved in order to maintain the maximum level of accuracy.
2020-07-25 17:00:36 +03:00
Aliaksandr Valialkin
97b6f5d223
app/vmselect/promql: optimize buckets_limit(k, buckets) for big number of buckets
2020-07-25 13:24:03 +03:00
Aliaksandr Valialkin
bb161497cf
app/vmselect/promql: improve the accuracy of buckets_limit(k, buckets) function
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Now it properly merges the bucket with the previous bucket after deletion.
2020-07-24 17:07:49 +03:00
Aliaksandr Valialkin
994fa2f3bf
app/vmselect/promql: add buckets_limit(k, buckets) function, which limits the number of buckets per time series to k
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This function works with both Prometheus-style and VictoriaMetrics-style buckets.
The function removes buckets with the lowest values in order to reserve the highest precision.
The function is useful for building heatmaps in Grafana from too big number of buckets.
2020-07-24 16:13:53 +03:00
Aliaksandr Valialkin
6b5ad535ae
app/vmselect/promql: optimize group(rollup(m)) calculations
2020-07-17 16:47:16 +03:00
Aliaksandr Valialkin
5d3db3ff7c
app/vmselect: add interpolate function for filling gaps with linearly interpolated values
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See https://stackoverflow.com/q/62565021/274937 for details
2020-07-02 14:54:21 +03:00
Aliaksandr Valialkin
d5dddb0953
all: use %w instead of %s for wrapping errors in fmt.Errorf
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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
nicbaz
774f7ca1c1
vmselect: fix label_replace when mismatch ( #579 )
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As per documentation on `label_replace` function: "If the regular
expression doesn't match then the timeseries is returned unchanged".
Currently this behavior is not enforced, if a regexp on an existing
tag doesn't match then the tag value is copied as-is in the destination
tag. This fix first checks that the regular expression matches the
source tag before applying anything.
Given the current implementation, this fix also changes the behavior
of the **MetricsQL** `label_transform` function which does not
document this behavior at the moment.
2020-06-23 23:50:33 +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
6f7f64f757
app/vmselect: handle timestamp(metric offset X) the same way as Prometheus does
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/415
2020-04-15 12:01:00 +03:00
Aliaksandr Valialkin
3c7c71a49c
app/vmselect: adjust label_map() handling for corner cases
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The following corner cases now supported:
* label_map(q, "label", "", "foo") - adds `label="foo"` to series with missing `label`
* label_map(q, "label", "foo", "") - removes `label="foo"` from series
All the unmatched labels are kept unchanged.
2020-03-13 18:45:03 +02:00
Aliaksandr Valialkin
fdc2a9d1d7
app/vmselect: add label_map(q, label, srcValue1, dstValue1, ... srcValueN, dstValueN) function to MetricsQL
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/369
2020-03-12 19:13:47 +02:00
Aliaksandr Valialkin
7b1c7051a3
app/vmselect: add sort_by_label(q, label) and sort_by_label_desc(q, label) functions
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This is implementation of https://github.com/prometheus/prometheus/pull/1533 for VictoriaMetrics.
2020-02-13 17:01:37 +02:00
Aliaksandr Valialkin
a6c6a2debc
app/vmselect/promql: do not add step to range end, since this hack became obsolete since commit 9e1119dab8
2020-02-05 21:22:19 +02:00
Aliaksandr Valialkin
a462355b2f
app/vmselect/promql: add keep_next_value(q) for filling gaps with the next non-empty value
2020-01-29 00:48:04 +02:00
Aliaksandr Valialkin
2392a359e1
app/vmselect/promql: fix panic on a single zero vmrange bucket in prometheus_buckets() function
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/296
2020-01-27 18:04:55 +02:00
Aliaksandr Valialkin
36973ee975
app/vmselect/promql: add label_match(q, label, regexp) and label_mismatch(q, label, regexp) functions for filtering out time series with labels matching the given regexp
2020-01-21 15:00:20 +02:00
