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Oleg Zaytsev 3947238ce0
Label values with matchers by intersecting postings (#9907) 
* LabelValues w/matchers by intersecting postings

Instead of iterating all matched series to find the values, this
checks if each one of the label values is present in the matched series
(postings).

Pending to be benchmarked.

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>

* Benchmark labelValuesWithMatchers

name                                                                   old time/op    new time/op
Querier/Head/labelValuesWithMatchers/i_with_n="1"                         157ms ± 0%        48ms ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="^.+$"                      1.80s ± 0%       0.46s ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",j!="foo"                144ms ± 0%        57ms ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"      304ms ± 0%       111ms ± 0%
Querier/Head/labelValuesWithMatchers/n_with_j!="foo"                      761ms ± 0%       164ms ± 0%
Querier/Head/labelValuesWithMatchers/n_with_i="1"                        6.11µs ± 0%      6.62µs ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1"                        117ms ± 0%        62ms ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="^.+$"                     1.44s ± 0%       0.24s ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",j!="foo"              92.1ms ± 0%      70.3ms ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"     196ms ± 0%       115ms ± 0%
Querier/Block/labelValuesWithMatchers/n_with_j!="foo"                     1.23s ± 0%       0.21s ± 0%
Querier/Block/labelValuesWithMatchers/n_with_i="1"                       1.06ms ± 0%      0.88ms ± 0%

name                                                                   old alloc/op   new alloc/op
Querier/Head/labelValuesWithMatchers/i_with_n="1"                        29.5MB ± 0%      26.9MB ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="^.+$"                     46.8MB ± 0%     251.5MB ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",j!="foo"               29.5MB ± 0%      22.3MB ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"     46.8MB ± 0%      23.9MB ± 0%
Querier/Head/labelValuesWithMatchers/n_with_j!="foo"                     10.3kB ± 0%  138535.2kB ± 0%
Querier/Head/labelValuesWithMatchers/n_with_i="1"                        5.54kB ± 0%      7.09kB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1"                       39.1MB ± 0%      28.5MB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="^.+$"                     287MB ± 0%       253MB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",j!="foo"              34.3MB ± 0%      23.9MB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"    51.6MB ± 0%      25.5MB ± 0%
Querier/Block/labelValuesWithMatchers/n_with_j!="foo"                     144MB ± 0%       139MB ± 0%
Querier/Block/labelValuesWithMatchers/n_with_i="1"                       6.43kB ± 0%      8.66kB ± 0%

name                                                                   old allocs/op  new allocs/op
Querier/Head/labelValuesWithMatchers/i_with_n="1"                          104k ± 0%        500k ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="^.+$"                       204k ± 0%        600k ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",j!="foo"                 104k ± 0%        500k ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"       204k ± 0%        500k ± 0%
Querier/Head/labelValuesWithMatchers/n_with_j!="foo"                       66.0 ± 0%       255.0 ± 0%
Querier/Head/labelValuesWithMatchers/n_with_i="1"                          61.0 ± 0%       205.0 ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1"                         304k ± 0%        600k ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="^.+$"                     5.20M ± 0%       0.70M ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",j!="foo"                204k ± 0%        600k ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"      304k ± 0%        600k ± 0%
Querier/Block/labelValuesWithMatchers/n_with_j!="foo"                     3.00M ± 0%       0.00M ± 0%
Querier/Block/labelValuesWithMatchers/n_with_i="1"                         61.0 ± 0%       247.0 ± 0%

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>

* Don't expand postings to intersect them

Using a min heap we can check whether matched postings intersect with
each one of the label values postings. This avoid expanding postings
(and thus having all of them in memory at any point).

Slightly slower than the expanding postings version for some cases, but
definitely pays the price once the cardinality grows.

Still offers 10x latency improvement where previous latencies were
reaching 1s.

Benchmark results:

name \ time/op                                                         old.txt      intersect.txt    intersect_noexpand.txt
Querier/Head/labelValuesWithMatchers/i_with_n="1"                       157ms ± 0%        48ms ± 0%              110ms ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="^.+$"                    1.80s ± 0%       0.46s ± 0%              0.18s ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",j!="foo"              144ms ± 0%        57ms ± 0%              125ms ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"    304ms ± 0%       111ms ± 0%              177ms ± 0%
Querier/Head/labelValuesWithMatchers/n_with_j!="foo"                    761ms ± 0%       164ms ± 0%              134ms ± 0%
Querier/Head/labelValuesWithMatchers/n_with_i="1"                      6.11µs ± 0%      6.62µs ± 0%             4.29µs ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1"                      117ms ± 0%        62ms ± 0%              120ms ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="^.+$"                   1.44s ± 0%       0.24s ± 0%              0.15s ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",j!="foo"            92.1ms ± 0%      70.3ms ± 0%            125.4ms ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"   196ms ± 0%       115ms ± 0%              170ms ± 0%
Querier/Block/labelValuesWithMatchers/n_with_j!="foo"                   1.23s ± 0%       0.21s ± 0%              0.14s ± 0%
Querier/Block/labelValuesWithMatchers/n_with_i="1"                     1.06ms ± 0%      0.88ms ± 0%             0.92ms ± 0%

name \ alloc/op                                                        old.txt      intersect.txt    intersect_noexpand.txt
Querier/Head/labelValuesWithMatchers/i_with_n="1"                      29.5MB ± 0%      26.9MB ± 0%             19.1MB ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="^.+$"                   46.8MB ± 0%     251.5MB ± 0%             36.3MB ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",j!="foo"             29.5MB ± 0%      22.3MB ± 0%             19.1MB ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"   46.8MB ± 0%      23.9MB ± 0%             20.7MB ± 0%
Querier/Head/labelValuesWithMatchers/n_with_j!="foo"                   10.3kB ± 0%  138535.2kB ± 0%              6.4kB ± 0%
Querier/Head/labelValuesWithMatchers/n_with_i="1"                      5.54kB ± 0%      7.09kB ± 0%             4.30kB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1"                     39.1MB ± 0%      28.5MB ± 0%             20.7MB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="^.+$"                   287MB ± 0%       253MB ± 0%               38MB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",j!="foo"            34.3MB ± 0%      23.9MB ± 0%             20.7MB ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"  51.6MB ± 0%      25.5MB ± 0%             22.3MB ± 0%
Querier/Block/labelValuesWithMatchers/n_with_j!="foo"                   144MB ± 0%       139MB ± 0%                0MB ± 0%
Querier/Block/labelValuesWithMatchers/n_with_i="1"                     6.43kB ± 0%      8.66kB ± 0%             5.86kB ± 0%

name \ allocs/op                                                       old.txt      intersect.txt    intersect_noexpand.txt
Querier/Head/labelValuesWithMatchers/i_with_n="1"                        104k ± 0%        500k ± 0%               300k ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="^.+$"                     204k ± 0%        600k ± 0%               400k ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",j!="foo"               104k ± 0%        500k ± 0%               300k ± 0%
Querier/Head/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"     204k ± 0%        500k ± 0%               300k ± 0%
Querier/Head/labelValuesWithMatchers/n_with_j!="foo"                     66.0 ± 0%       255.0 ± 0%              139.0 ± 0%
Querier/Head/labelValuesWithMatchers/n_with_i="1"                        61.0 ± 0%       205.0 ± 0%               87.0 ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1"                       304k ± 0%        600k ± 0%               400k ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="^.+$"                   5.20M ± 0%       0.70M ± 0%              0.50M ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",j!="foo"              204k ± 0%        600k ± 0%               400k ± 0%
Querier/Block/labelValuesWithMatchers/i_with_n="1",i=~"^.*$",j!="foo"    304k ± 0%        600k ± 0%               400k ± 0%
Querier/Block/labelValuesWithMatchers/n_with_j!="foo"                   3.00M ± 0%       0.00M ± 0%              0.00M ± 0%
Querier/Block/labelValuesWithMatchers/n_with_i="1"                       61.0 ± 0%       247.0 ± 0%              129.0 ± 0%

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>

* Apply comment suggestions from the code review

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>

Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>

* Change else { if } to else if

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>

* Remove sorting of label values

We were not sorting them before, so no need to sort them now

Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>

Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>
 		2021-12-28 15:59:03 +01:00
..
agent tsdb/agent: Synchronize appender code with grafana/agent main (#9664) 2021-11-30 21:14:40 +05:30
chunkenc improve bstream comments and doc (#9560) 2021-10-25 18:44:15 +05:30
chunks clarify HeadChunkID type and usage (#9726) 2021-11-17 18:35:10 +05:30
docs clarify HeadChunkID type and usage (#9726) 2021-11-17 18:35:10 +05:30
encoding Format Go source files using 'gofumpt -w -s -extra' 2021-11-02 19:52:34 +01:00
errors Address golint failures from revive 2021-10-23 00:53:11 +02:00
fileutil tsdb: Add windows arm64 support. 2021-11-09 11:07:27 +01:00
goversion Add new Go build tags. 2021-08-27 10:24:14 +02:00
index Label values with matchers by intersecting postings (#9907) 2021-12-28 15:59:03 +01:00
record Add basic initial developer docs for TSDB (#9451) 2021-11-17 15:51:27 +05:30
test Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
testdata
…
tombstones TSDB: demistify SeriesRefs and ChunkRefs (#9536) 2021-11-06 15:40:04 +05:30
tsdbutil storage: fix bug #10027 in iterators' Seek method 2021-12-16 12:07:35 +01:00
wal fix: panic when checkpoint directory is empty (#9687) 2021-11-17 16:39:04 +05:30
.gitignore
…
CHANGELOG.md Rename default branch to main 2021-02-22 20:28:02 +01:00
README.md Add basic initial developer docs for TSDB (#9451) 2021-11-17 15:51:27 +05:30
block.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
block_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
blockwriter.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
blockwriter_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
compact.go TSDB: demistify SeriesRefs and ChunkRefs (#9536) 2021-11-06 15:40:04 +05:30
compact_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
db.go Add the ability to disable tsdb isolation (#9270) 2021-11-19 15:41:32 +05:30
db_test.go Fix panic, out of order chunks, and race warning during WAL replay (#9856) 2021-11-25 13:36:14 +05:30
example_test.go Add basic initial developer docs for TSDB (#9451) 2021-11-17 15:51:27 +05:30
exemplar.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
exemplar_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
head.go Fix queries after a failed snapshot replay (#9980) 2021-12-09 15:15:27 +05:30
head_append.go Add the ability to disable tsdb isolation (#9270) 2021-11-19 15:41:32 +05:30
head_bench_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
head_read.go Label values with matchers by intersecting postings (#9907) 2021-12-28 15:59:03 +01:00
head_test.go Fix queries after a failed snapshot replay (#9980) 2021-12-09 15:15:27 +05:30
head_wal.go Fix queries after a failed snapshot replay (#9980) 2021-12-09 15:15:27 +05:30
isolation.go Add the ability to disable tsdb isolation (#9270) 2021-11-19 15:41:32 +05:30
isolation_test.go Add the ability to disable tsdb isolation (#9270) 2021-11-19 15:41:32 +05:30
mocks_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
querier.go Label values with matchers by intersecting postings (#9907) 2021-12-28 15:59:03 +01:00
querier_bench_test.go Label values with matchers by intersecting postings (#9907) 2021-12-28 15:59:03 +01:00
querier_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
repair.go Switched to go-kit/log 2021-06-11 12:28:36 -04:00
repair_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00
tsdbblockutil.go TSDB: demistify SeriesRefs and ChunkRefs (#9536) 2021-11-06 15:40:04 +05:30
wal.go fix potential goroutine leaks 2021-12-17 18:35:30 -05:00
wal_test.go Move packages out of deprecated pkg directory 2021-11-09 08:03:10 +01:00

README.md

TSDB

GoPkg

This directory contains the Prometheus TSDB (Time Series DataBase) library, which handles storage and querying of all Prometheus v2 data.

Due to an issue with versioning, the "latest" docs shown on Godoc are outdated. Instead you may use the docs for v2.31.1

Documentation

External resources

A series of blog posts explaining different components of TSDB: