store: Optimized common cases for time selecting smaller amount of series. Avoid looking up symbols. #3531

bwplotka · 2020-12-02T19:09:15Z

Key rationales: The majority of query latency comes from symbols.Lookup.

Also cleaned up the code.

Benchmarks

Baseline:

/tmp/___BenchmarkTelemeterRealData_Series_in_github_com_thanos_io_thanos_pkg_store -test.v -test.bench ^\QBenchmarkTelemeterRealData_Series\E$ -test.run ^$ -test.benchtime=1m -test.benchmem
goos: linux
goarch: amd64
pkg: github.com/thanos-io/thanos/pkg/store
BenchmarkTelemeterRealData_Series
Built index header; Starting
BenchmarkTelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E
BenchmarkTelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12         	      43	1866550478 ns/op	395648807 B/op	 4348808 allocs/op
BenchmarkTelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E
BenchmarkTelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12        	      50	1417560470 ns/op	160595177 B/op	 3017177 allocs/op
BenchmarkTelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E
BenchmarkTelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12      	     392	 168130862 ns/op	49921099 B/op	  493076 allocs/op
BenchmarkTelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E
BenchmarkTelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12           	      14	5295236741 ns/op	1083815895 B/op	11798226 allocs/op
BenchmarkTelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E
BenchmarkTelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12          	      18	4149971387 ns/op	436568360 B/op	 8577264 allocs/op
PASS

Process finished with exit code 0

``

New

benchstat -delta-test=none _dev/bench/store_symb_a.txt _dev/bench/store_symb_b.txt
name                                                                old time/op    new time/op    delta
TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12        1.87s ± 0%     1.66s ± 0%  -10.85%
TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12       1.42s ± 0%     0.25s ± 0%  -82.17%
TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12     168ms ± 0%     157ms ± 0%   -6.72%
TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12          5.30s ± 0%     4.53s ± 0%  -14.53%
TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12         4.15s ± 0%     0.68s ± 0%  -83.67%

name                                                                old alloc/op   new alloc/op   delta
TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12        396MB ± 0%     396MB ± 0%   -0.00%
TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12       161MB ± 0%      95MB ± 0%  -40.95%
TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12    49.9MB ± 0%    49.9MB ± 0%   +0.00%
TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12         1.08GB ± 0%    1.08GB ± 0%   -0.00%
TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12         437MB ± 0%     228MB ± 0%  -47.77%

name                                                                old allocs/op  new allocs/op  delta
TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12        4.35M ± 0%     4.35M ± 0%   -0.00%
TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12       3.02M ± 0%     0.05M ± 0%  -98.36%
TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12      493k ± 0%      493k ± 0%   +0.00%
TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12          11.8M ± 0%     11.8M ± 0%   -0.00%
TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12         8.58M ± 0%     0.02M ± 0%  -99.78%

Cmp:

benchstat -delta-test=none _dev/bench/store_symb_a.txt _dev/bench/store_symb_b.txt
name                                                                old time/op    new time/op    delta
TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12        1.87s ± 0%     1.66s ± 0%  -10.85%
TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12       1.42s ± 0%     0.25s ± 0%  -82.17%
TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12     168ms ± 0%     157ms ± 0%   -6.72%
TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12          5.30s ± 0%     4.53s ± 0%  -14.53%
TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12         4.15s ± 0%     0.68s ± 0%  -83.67%

name                                                                old alloc/op   new alloc/op   delta
TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12        396MB ± 0%     396MB ± 0%   -0.00%
TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12       161MB ± 0%      95MB ± 0%  -40.95%
TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12    49.9MB ± 0%    49.9MB ± 0%   +0.00%
TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12         1.08GB ± 0%    1.08GB ± 0%   -0.00%
TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12         437MB ± 0%     228MB ± 0%  -47.77%

name                                                                old allocs/op  new allocs/op  delta
TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12        4.35M ± 0%     4.35M ± 0%   -0.00%
TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12       3.02M ± 0%     0.05M ± 0%  -98.36%
TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12      493k ± 0%      493k ± 0%   +0.00%
TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12          11.8M ± 0%     11.8M ± 0%   -0.00%
TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12         8.58M ± 0%     0.02M ± 0%  -99.78%

Code: https://gist.github.com/bwplotka/cbcbbcd1802181b7785da11dcc0f5cfd

Signed-off-by: Bartlomiej Plotka bwplotka@gmail.com

…Avoid looking up symbols. Key part: Majority of query latency comes from symbols.Lookup. Also cleaned up the code. ## Benchmarks Baseline: ``` /tmp/___BenchmarkTelemeterRealData_Series_in_github_com_thanos_io_thanos_pkg_store -test.v -test.bench ^\QBenchmarkTelemeterRealData_Series\E$ -test.run ^$ -test.benchtime=1m -test.benchmem goos: linux goarch: amd64 pkg: github.com/thanos-io/thanos/pkg/store BenchmarkTelemeterRealData_Series Built index header; Starting BenchmarkTelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E BenchmarkTelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12 43 1866550478 ns/op 395648807 B/op 4348808 allocs/op BenchmarkTelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E BenchmarkTelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12 50 1417560470 ns/op 160595177 B/op 3017177 allocs/op BenchmarkTelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E BenchmarkTelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 392 168130862 ns/op 49921099 B/op 493076 allocs/op BenchmarkTelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E BenchmarkTelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 14 5295236741 ns/op 1083815895 B/op 11798226 allocs/op BenchmarkTelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E BenchmarkTelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12 18 4149971387 ns/op 436568360 B/op 8577264 allocs/op PASS Process finished with exit code 0 ``` New ``` benchstat -delta-test=none _dev/bench/store_symb_a.txt _dev/bench/store_symb_b.txt name old time/op new time/op delta TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12 1.87s ± 0% 1.66s ± 0% -10.85% TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12 1.42s ± 0% 0.25s ± 0% -82.17% TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 168ms ± 0% 157ms ± 0% -6.72% TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 5.30s ± 0% 4.53s ± 0% -14.53% TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12 4.15s ± 0% 0.68s ± 0% -83.67% name old alloc/op new alloc/op delta TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12 396MB ± 0% 396MB ± 0% -0.00% TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12 161MB ± 0% 95MB ± 0% -40.95% TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 49.9MB ± 0% 49.9MB ± 0% +0.00% TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 1.08GB ± 0% 1.08GB ± 0% -0.00% TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12 437MB ± 0% 228MB ± 0% -47.77% name old allocs/op new allocs/op delta TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12 4.35M ± 0% 4.35M ± 0% -0.00% TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12 3.02M ± 0% 0.05M ± 0% -98.36% TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 493k ± 0% 493k ± 0% +0.00% TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 11.8M ± 0% 11.8M ± 0% -0.00% TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12 8.58M ± 0% 0.02M ± 0% -99.78% ``` Cmp: ``` benchstat -delta-test=none _dev/bench/store_symb_a.txt _dev/bench/store_symb_b.txt name old time/op new time/op delta TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12 1.87s ± 0% 1.66s ± 0% -10.85% TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12 1.42s ± 0% 0.25s ± 0% -82.17% TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 168ms ± 0% 157ms ± 0% -6.72% TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 5.30s ± 0% 4.53s ± 0% -14.53% TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12 4.15s ± 0% 0.68s ± 0% -83.67% name old alloc/op new alloc/op delta TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12 396MB ± 0% 396MB ± 0% -0.00% TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12 161MB ± 0% 95MB ± 0% -40.95% TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 49.9MB ± 0% 49.9MB ± 0% +0.00% TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 1.08GB ± 0% 1.08GB ± 0% -0.00% TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12 437MB ± 0% 228MB ± 0% -47.77% name old allocs/op new allocs/op delta TelemeterRealData_Series/alerts2w/01DN3SK96XDAEKRB1AN30AAW6E-12 4.35M ± 0% 4.35M ± 0% -0.00% TelemeterRealData_Series/alerts15s/01DN3SK96XDAEKRB1AN30AAW6E-12 3.02M ± 0% 0.05M ± 0% -98.36% TelemeterRealData_Series/subssyncs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 493k ± 0% 493k ± 0% +0.00% TelemeterRealData_Series/subs2w/01DN3SK96XDAEKRB1AN30AAW6E-12 11.8M ± 0% 11.8M ± 0% -0.00% TelemeterRealData_Series/subs15s/01DN3SK96XDAEKRB1AN30AAW6E-12 8.58M ± 0% 0.02M ± 0% -99.78% ``` Code: https://gist.github.com/bwplotka/cbcbbcd1802181b7785da11dcc0f5cfd Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

pkg/store/bucket.go

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

yeya24

LGTM! Amazing optimization!

yeya24 · 2020-12-03T17:27:33Z

pkg/store/bucket.go

-			}
-			sort.Sort(s.lset)
+		}
+		if err := indexr.LookupLabelsSymbols(symbolizedLset, &lset); err != nil {


Another idea to optimize this:

we can pass s.lset and extLset to this function, if the label name is already in extLset, we don't need to decode that label value

Then we can simplify line 746-756 and reduce the slice append

Nice, will try it out

Hm what about merging this improvement and focusing on next ones in next PR?

Did a simple benchmark but seems this idea is not very good.

name old time/op new time/op delta BucketSeries/1000000SeriesWith1Samples/1of1000000 162ms ± 0% 205ms ± 0% +26.23% BucketSeries/1000000SeriesWith1Samples/10of1000000 206ms ± 0% 175ms ± 0% -15.38% BucketSeries/1000000SeriesWith1Samples/1000000of1000000 3.90s ± 0% 4.54s ± 0% +16.47% BucketSeries/100000SeriesWith100Samples/1of10000000 13.8ms ± 0% 12.3ms ± 0% -11.25% BucketSeries/100000SeriesWith100Samples/100of10000000 13.4ms ± 0% 13.0ms ± 0% -2.59% BucketSeries/100000SeriesWith100Samples/10000000of10000000 323ms ± 0% 356ms ± 0% +10.39% BucketSeries/1SeriesWith10000000Samples/1of10000000 229µs ± 0% 166µs ± 0% -27.38% BucketSeries/1SeriesWith10000000Samples/100of10000000 246µs ± 0% 168µs ± 0% -31.50% BucketSeries/1SeriesWith10000000Samples/10000000of10000000 105ms ± 0% 75ms ± 0% -28.75% name old alloc/op new alloc/op delta BucketSeries/1000000SeriesWith1Samples/1of1000000 62.0MB ± 0% 62.1MB ± 0% +0.01% BucketSeries/1000000SeriesWith1Samples/10of1000000 62.0MB ± 0% 62.0MB ± 0% +0.00% BucketSeries/1000000SeriesWith1Samples/1000000of1000000 1.30GB ± 0% 1.31GB ± 0% +1.17% BucketSeries/100000SeriesWith100Samples/1of10000000 4.86MB ± 0% 4.86MB ± 0% -0.00% BucketSeries/100000SeriesWith100Samples/100of10000000 4.82MB ± 0% 4.82MB ± 0% +0.00% BucketSeries/100000SeriesWith100Samples/10000000of10000000 125MB ± 0% 127MB ± 0% +1.50% BucketSeries/1SeriesWith10000000Samples/1of10000000 225kB ± 0% 225kB ± 0% -0.05% BucketSeries/1SeriesWith10000000Samples/100of10000000 225kB ± 0% 225kB ± 0% -0.04% BucketSeries/1SeriesWith10000000Samples/10000000of10000000 38.0MB ± 0% 38.0MB ± 0% -0.00% name old allocs/op new allocs/op delta BucketSeries/1000000SeriesWith1Samples/1of1000000 9.70k ± 0% 9.70k ± 0% +0.07% BucketSeries/1000000SeriesWith1Samples/10of1000000 9.81k ± 0% 9.81k ± 0% -0.01% BucketSeries/1000000SeriesWith1Samples/1000000of1000000 12.1M ± 0% 12.1M ± 0% -0.00% BucketSeries/100000SeriesWith100Samples/1of10000000 1.11k ± 0% 1.11k ± 0% -0.27% BucketSeries/100000SeriesWith100Samples/100of10000000 1.15k ± 0% 1.15k ± 0% -0.17% BucketSeries/100000SeriesWith100Samples/10000000of10000000 1.21M ± 0% 1.21M ± 0% -0.00% BucketSeries/1SeriesWith10000000Samples/1of10000000 210 ± 0% 208 ± 0% -0.95% BucketSeries/1SeriesWith10000000Samples/100of10000000 210 ± 0% 208 ± 0% -0.95% BucketSeries/1SeriesWith10000000Samples/10000000of10000000 170k ± 0% 170k ± 0% -0.01%

Similar optimization to what we did on Thanos: thanos-io/thanos#3531 Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

brancz

very nice work!

wiardvanrij · 2020-12-04T14:02:34Z

pkg/store/bucket.go

 	)
 	for _, id := range ps {
-		if err := indexr.LoadedSeries(id, &lset, &chks, req); err != nil {
+		ok, err := indexr.LoadSeriesForTime(id, &symbolizedLset, &chks, req.SkipChunks, req.MinTime, req.MaxTime)


Really nitpick, but perhaps ok -> found ? Also on line 2091.

Similar optimization to what we did on Thanos: thanos-io/thanos#3531 Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

pracucci

Good job! Diff is a bit hard to read, but comparing with previous version it LGTM.

bwplotka requested review from kakkoyun, pracucci, brancz, squat and yeya24 December 2, 2020 19:09

bwplotka changed the title ~~store: Optimized common cases for time selecting tiny amount series. Avoid looking up symbols.~~ store: Optimized common cases for time selecting tiny amount of series. Avoid looking up symbols. Dec 2, 2020

Fixed chunk mint.

593b0d6

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

bwplotka changed the title ~~store: Optimized common cases for time selecting tiny amount of series. Avoid looking up symbols.~~ store: Optimized common cases for time selecting smaller amount of series. Avoid looking up symbols. Dec 2, 2020

yeya24 requested changes Dec 2, 2020

View reviewed changes

pkg/store/bucket.go Show resolved Hide resolved

Fixed bug spotted by Ben!

97f1ea0

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

yeya24 approved these changes Dec 3, 2020

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yeya24 reviewed Dec 3, 2020

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bwplotka added a commit to prometheus/prometheus that referenced this pull request Dec 3, 2020

Avoid un-symbolizing labels if not needed.

6d79ac1

Similar optimization to what we did on Thanos: thanos-io/thanos#3531 Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

brancz approved these changes Dec 4, 2020

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bwplotka merged commit 5cb63f8 into master Dec 4, 2020

bwplotka deleted the decode-series-optimize branch December 4, 2020 11:02

wiardvanrij reviewed Dec 4, 2020

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bwplotka added a commit to prometheus/prometheus that referenced this pull request Dec 4, 2020

Avoid un-symbolizing labels if not needed.

a6f11c1

Similar optimization to what we did on Thanos: thanos-io/thanos#3531 Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

bwplotka added a commit to prometheus/prometheus that referenced this pull request Dec 4, 2020

Avoid un-symbolizing labels if not needed.

25359e9

Similar optimization to what we did on Thanos: thanos-io/thanos#3531 Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

bwplotka mentioned this pull request Dec 4, 2020

Avoid un-symbolizing labels if not needed. prometheus/prometheus#8257

Closed

pracucci reviewed Jan 7, 2021

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pracucci mentioned this pull request Jan 7, 2021

Upgraded Thanos cortexproject/cortex#3661

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store: Optimized common cases for time selecting smaller amount of series. Avoid looking up symbols. #3531

store: Optimized common cases for time selecting smaller amount of series. Avoid looking up symbols. #3531

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store: Optimized common cases for time selecting smaller amount of series. Avoid looking up symbols. #3531

store: Optimized common cases for time selecting smaller amount of series. Avoid looking up symbols. #3531

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