mirror of
https://github.com/prometheus/prometheus.git
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ed172a6667
Don't calculate postings beforehand: we may not need them. If all matchers are for the requested label, we can just filter its values. Also, if there are no values at all, no need to run any kind of logic. Also add more labelValuesWithMatchers benchmarks Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>
310 lines
11 KiB
Go
310 lines
11 KiB
Go
// Copyright 2018 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tsdb
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import (
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"context"
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"fmt"
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"strconv"
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"testing"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/tsdb/index"
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"github.com/stretchr/testify/require"
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)
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// Make entries ~50B in size, to emulate real-world high cardinality.
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const (
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postingsBenchSuffix = "aaaaaaaaaabbbbbbbbbbccccccccccdddddddddd"
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)
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func BenchmarkQuerier(b *testing.B) {
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opts := DefaultHeadOptions()
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opts.ChunkRange = 1000
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opts.ChunkDirRoot = b.TempDir()
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h, err := NewHead(nil, nil, nil, nil, opts, nil)
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require.NoError(b, err)
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defer func() {
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require.NoError(b, h.Close())
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}()
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app := h.Appender(context.Background())
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addSeries := func(l labels.Labels) {
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app.Append(0, l, 0, 0)
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}
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for n := 0; n < 10; n++ {
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for i := 0; i < 100000; i++ {
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addSeries(labels.FromStrings("i", strconv.Itoa(i)+postingsBenchSuffix, "n", strconv.Itoa(n)+postingsBenchSuffix, "j", "foo"))
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// Have some series that won't be matched, to properly test inverted matches.
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addSeries(labels.FromStrings("i", strconv.Itoa(i)+postingsBenchSuffix, "n", strconv.Itoa(n)+postingsBenchSuffix, "j", "bar"))
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addSeries(labels.FromStrings("i", strconv.Itoa(i)+postingsBenchSuffix, "n", "0_"+strconv.Itoa(n)+postingsBenchSuffix, "j", "bar"))
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addSeries(labels.FromStrings("i", strconv.Itoa(i)+postingsBenchSuffix, "n", "1_"+strconv.Itoa(n)+postingsBenchSuffix, "j", "bar"))
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addSeries(labels.FromStrings("i", strconv.Itoa(i)+postingsBenchSuffix, "n", "2_"+strconv.Itoa(n)+postingsBenchSuffix, "j", "foo"))
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}
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}
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require.NoError(b, app.Commit())
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b.Run("Head", func(b *testing.B) {
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ir, err := h.Index()
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require.NoError(b, err)
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defer func() {
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require.NoError(b, ir.Close())
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}()
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b.Run("PostingsForMatchers", func(b *testing.B) {
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benchmarkPostingsForMatchers(b, ir)
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})
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b.Run("labelValuesWithMatchers", func(b *testing.B) {
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benchmarkLabelValuesWithMatchers(b, ir)
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})
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})
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b.Run("Block", func(b *testing.B) {
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blockdir := createBlockFromHead(b, b.TempDir(), h)
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block, err := OpenBlock(nil, blockdir, nil)
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require.NoError(b, err)
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defer func() {
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require.NoError(b, block.Close())
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}()
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ir, err := block.Index()
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require.NoError(b, err)
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defer func() {
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require.NoError(b, ir.Close())
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}()
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b.Run("PostingsForMatchers", func(b *testing.B) {
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benchmarkPostingsForMatchers(b, ir)
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})
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b.Run("labelValuesWithMatchers", func(b *testing.B) {
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benchmarkLabelValuesWithMatchers(b, ir)
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})
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})
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}
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func benchmarkPostingsForMatchers(b *testing.B, ir IndexReader) {
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ctx := context.Background()
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n1 := labels.MustNewMatcher(labels.MatchEqual, "n", "1"+postingsBenchSuffix)
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nX := labels.MustNewMatcher(labels.MatchEqual, "n", "X"+postingsBenchSuffix)
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jFoo := labels.MustNewMatcher(labels.MatchEqual, "j", "foo")
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jNotFoo := labels.MustNewMatcher(labels.MatchNotEqual, "j", "foo")
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iStar := labels.MustNewMatcher(labels.MatchRegexp, "i", "^.*$")
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i1Star := labels.MustNewMatcher(labels.MatchRegexp, "i", "^1.*$")
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iStar1 := labels.MustNewMatcher(labels.MatchRegexp, "i", "^.*1$")
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iStar1Star := labels.MustNewMatcher(labels.MatchRegexp, "i", "^.*1.*$")
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iPlus := labels.MustNewMatcher(labels.MatchRegexp, "i", "^.+$")
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i1Plus := labels.MustNewMatcher(labels.MatchRegexp, "i", "^1.+$")
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iEmptyRe := labels.MustNewMatcher(labels.MatchRegexp, "i", "^$")
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iNotEmpty := labels.MustNewMatcher(labels.MatchNotEqual, "i", "")
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iNot2 := labels.MustNewMatcher(labels.MatchNotEqual, "i", "2"+postingsBenchSuffix)
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iNot2Star := labels.MustNewMatcher(labels.MatchNotRegexp, "i", "^2.*$")
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iNotStar2Star := labels.MustNewMatcher(labels.MatchNotRegexp, "i", "^.*2.*$")
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jFooBar := labels.MustNewMatcher(labels.MatchRegexp, "j", "foo|bar")
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jXXXYYY := labels.MustNewMatcher(labels.MatchRegexp, "j", "XXX|YYY")
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jXplus := labels.MustNewMatcher(labels.MatchRegexp, "j", "X.+")
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iCharSet := labels.MustNewMatcher(labels.MatchRegexp, "i", "1[0-9]")
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iAlternate := labels.MustNewMatcher(labels.MatchRegexp, "i", "(1|2|3|4|5|6|20|55)")
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iNotAlternate := labels.MustNewMatcher(labels.MatchNotRegexp, "i", "(1|2|3|4|5|6|20|55)")
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iXYZ := labels.MustNewMatcher(labels.MatchRegexp, "i", "X|Y|Z")
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iNotXYZ := labels.MustNewMatcher(labels.MatchNotRegexp, "i", "X|Y|Z")
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cases := []struct {
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name string
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matchers []*labels.Matcher
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}{
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{`n="1"`, []*labels.Matcher{n1}},
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{`n="X"`, []*labels.Matcher{nX}},
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{`n="1",j="foo"`, []*labels.Matcher{n1, jFoo}},
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{`n="X",j="foo"`, []*labels.Matcher{nX, jFoo}},
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{`j="foo",n="1"`, []*labels.Matcher{jFoo, n1}},
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{`n="1",j!="foo"`, []*labels.Matcher{n1, jNotFoo}},
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{`n="1",i!="2"`, []*labels.Matcher{n1, iNot2}},
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{`n="X",j!="foo"`, []*labels.Matcher{nX, jNotFoo}},
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{`i=~"1[0-9]",j=~"foo|bar"`, []*labels.Matcher{iCharSet, jFooBar}},
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{`j=~"foo|bar"`, []*labels.Matcher{jFooBar}},
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{`j=~"XXX|YYY"`, []*labels.Matcher{jXXXYYY}},
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{`j=~"X.+"`, []*labels.Matcher{jXplus}},
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{`i=~"(1|2|3|4|5|6|20|55)"`, []*labels.Matcher{iAlternate}},
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{`i!~"(1|2|3|4|5|6|20|55)"`, []*labels.Matcher{iNotAlternate}},
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{`i=~"X|Y|Z"`, []*labels.Matcher{iXYZ}},
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{`i!~"X|Y|Z"`, []*labels.Matcher{iNotXYZ}},
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{`i=~".*"`, []*labels.Matcher{iStar}},
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{`i=~"1.*"`, []*labels.Matcher{i1Star}},
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{`i=~".*1"`, []*labels.Matcher{iStar1}},
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{`i=~".+"`, []*labels.Matcher{iPlus}},
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{`i=~".+",j=~"X.+"`, []*labels.Matcher{iPlus, jXplus}},
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{`i=~""`, []*labels.Matcher{iEmptyRe}},
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{`i!=""`, []*labels.Matcher{iNotEmpty}},
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{`n="1",i=~".*",j="foo"`, []*labels.Matcher{n1, iStar, jFoo}},
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{`n="X",i=~".*",j="foo"`, []*labels.Matcher{nX, iStar, jFoo}},
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{`n="1",i=~".*",i!="2",j="foo"`, []*labels.Matcher{n1, iStar, iNot2, jFoo}},
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{`n="1",i!=""`, []*labels.Matcher{n1, iNotEmpty}},
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{`n="1",i!="",j="foo"`, []*labels.Matcher{n1, iNotEmpty, jFoo}},
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{`n="1",i!="",j=~"X.+"`, []*labels.Matcher{n1, iNotEmpty, jXplus}},
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{`n="1",i!="",j=~"XXX|YYY"`, []*labels.Matcher{n1, iNotEmpty, jXXXYYY}},
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{`n="1",i=~"X|Y|Z",j="foo"`, []*labels.Matcher{n1, iXYZ, jFoo}},
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{`n="1",i!~"X|Y|Z",j="foo"`, []*labels.Matcher{n1, iNotXYZ, jFoo}},
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{`n="1",i=~".+",j="foo"`, []*labels.Matcher{n1, iPlus, jFoo}},
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{`n="1",i=~"1.+",j="foo"`, []*labels.Matcher{n1, i1Plus, jFoo}},
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{`n="1",i=~".*1.*",j="foo"`, []*labels.Matcher{n1, iStar1Star, jFoo}},
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{`n="1",i=~".+",i!="2",j="foo"`, []*labels.Matcher{n1, iPlus, iNot2, jFoo}},
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{`n="1",i=~".+",i!~"2.*",j="foo"`, []*labels.Matcher{n1, iPlus, iNot2Star, jFoo}},
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{`n="1",i=~".+",i!~".*2.*",j="foo"`, []*labels.Matcher{n1, iPlus, iNotStar2Star, jFoo}},
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{`n="X",i=~".+",i!~".*2.*",j="foo"`, []*labels.Matcher{nX, iPlus, iNotStar2Star, jFoo}},
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}
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for _, c := range cases {
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b.Run(c.name, func(b *testing.B) {
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := PostingsForMatchers(ctx, ir, c.matchers...)
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require.NoError(b, err)
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}
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})
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}
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}
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func benchmarkLabelValuesWithMatchers(b *testing.B, ir IndexReader) {
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i1 := labels.MustNewMatcher(labels.MatchEqual, "i", "1")
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i1Plus := labels.MustNewMatcher(labels.MatchRegexp, "i", "1.+")
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i1PostingsBenchSuffix := labels.MustNewMatcher(labels.MatchEqual, "i", "1"+postingsBenchSuffix)
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iSuffix := labels.MustNewMatcher(labels.MatchRegexp, "i", ".+ddd")
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iStar := labels.MustNewMatcher(labels.MatchRegexp, "i", "^.*$")
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jNotFoo := labels.MustNewMatcher(labels.MatchNotEqual, "j", "foo")
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jXXXYYY := labels.MustNewMatcher(labels.MatchRegexp, "j", "XXX|YYY")
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jXplus := labels.MustNewMatcher(labels.MatchRegexp, "j", "X.+")
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n1 := labels.MustNewMatcher(labels.MatchEqual, "n", "1"+postingsBenchSuffix)
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nX := labels.MustNewMatcher(labels.MatchNotEqual, "n", "X"+postingsBenchSuffix)
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nPlus := labels.MustNewMatcher(labels.MatchRegexp, "n", "^.+$")
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ctx := context.Background()
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cases := []struct {
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name string
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labelName string
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matchers []*labels.Matcher
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}{
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// i is never "1", this isn't matching anything.
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{`i with i="1"`, "i", []*labels.Matcher{i1}},
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// i has 100k values.
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{`i with n="1"`, "i", []*labels.Matcher{n1}},
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{`i with n="^.+$"`, "i", []*labels.Matcher{nPlus}},
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{`i with n="1",j!="foo"`, "i", []*labels.Matcher{n1, jNotFoo}},
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{`i with n="1",j=~"X.+"`, "i", []*labels.Matcher{n1, jXplus}},
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{`i with n="1",j=~"XXX|YYY"`, "i", []*labels.Matcher{n1, jXXXYYY}},
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{`i with n="X",j!="foo"`, "i", []*labels.Matcher{nX, jNotFoo}},
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{`i with n="1",i=~"^.*$",j!="foo"`, "i", []*labels.Matcher{n1, iStar, jNotFoo}},
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// matchers on i itself
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{`i with i="1aaa...ddd"`, "i", []*labels.Matcher{i1PostingsBenchSuffix}},
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{`i with i=~"1.+"`, "i", []*labels.Matcher{i1Plus}},
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{`i with i=~"1.+",i=~".+ddd"`, "i", []*labels.Matcher{i1Plus, iSuffix}},
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// n has 10 values.
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{`n with j!="foo"`, "n", []*labels.Matcher{jNotFoo}},
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{`n with i="1"`, "n", []*labels.Matcher{i1}},
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{`n with i=~"1.+"`, "n", []*labels.Matcher{i1Plus}},
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// there's no label "none"
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{`none with i=~"1"`, "none", []*labels.Matcher{i1Plus}},
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}
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for _, c := range cases {
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b.Run(c.name, func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_, err := labelValuesWithMatchers(ctx, ir, c.labelName, c.matchers...)
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require.NoError(b, err)
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}
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})
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}
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}
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func BenchmarkMergedStringIter(b *testing.B) {
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numSymbols := 100000
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s := make([]string, numSymbols)
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for i := 0; i < numSymbols; i++ {
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s[i] = fmt.Sprintf("symbol%v", i)
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}
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for i := 0; i < b.N; i++ {
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it := NewMergedStringIter(index.NewStringListIter(s), index.NewStringListIter(s))
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for j := 0; j < 100; j++ {
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it = NewMergedStringIter(it, index.NewStringListIter(s))
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}
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for it.Next() {
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require.NotNil(b, it.At())
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require.NoError(b, it.Err())
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}
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}
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b.ReportAllocs()
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}
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func BenchmarkQuerierSelect(b *testing.B) {
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opts := DefaultHeadOptions()
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opts.ChunkRange = 1000
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opts.ChunkDirRoot = b.TempDir()
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h, err := NewHead(nil, nil, nil, nil, opts, nil)
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require.NoError(b, err)
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defer h.Close()
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app := h.Appender(context.Background())
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numSeries := 1000000
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for i := 0; i < numSeries; i++ {
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app.Append(0, labels.FromStrings("foo", "bar", "i", fmt.Sprintf("%d%s", i, postingsBenchSuffix)), int64(i), 0)
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}
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require.NoError(b, app.Commit())
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bench := func(b *testing.B, br BlockReader, sorted bool) {
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matcher := labels.MustNewMatcher(labels.MatchEqual, "foo", "bar")
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for s := 1; s <= numSeries; s *= 10 {
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b.Run(fmt.Sprintf("%dof%d", s, numSeries), func(b *testing.B) {
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q, err := NewBlockQuerier(br, 0, int64(s-1))
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require.NoError(b, err)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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ss := q.Select(context.Background(), sorted, nil, matcher)
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for ss.Next() {
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}
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require.NoError(b, ss.Err())
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}
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q.Close()
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})
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}
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}
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b.Run("Head", func(b *testing.B) {
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bench(b, h, false)
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})
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b.Run("SortedHead", func(b *testing.B) {
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bench(b, h, true)
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})
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tmpdir := b.TempDir()
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blockdir := createBlockFromHead(b, tmpdir, h)
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block, err := OpenBlock(nil, blockdir, nil)
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require.NoError(b, err)
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defer func() {
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require.NoError(b, block.Close())
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}()
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b.Run("Block", func(b *testing.B) {
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bench(b, block, false)
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})
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}
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