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VictoriaMetrics/app/vmselect
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Roman Khavronenko 909cd04c55
lib/storage: keep sample with the biggest value on timestamp conflict (#3421) 
The change leaves raw sample with the biggest value for identical
timestamps per each `-dedup.minScrapeInterval` discrete interval
when the deduplication is enabled.

```
benchstat old.txt new.txt
name                                         old time/op    new time/op    delta
DeduplicateSamples/minScrapeInterval=1s-10      817ns ± 2%     832ns ± 3%      ~     (p=0.052 n=10+10)
DeduplicateSamples/minScrapeInterval=2s-10     1.56µs ± 1%    2.12µs ± 0%   +35.19%  (p=0.000 n=9+7)
DeduplicateSamples/minScrapeInterval=5s-10     1.32µs ± 3%    1.65µs ± 2%   +25.57%  (p=0.000 n=10+10)
DeduplicateSamples/minScrapeInterval=10s-10    1.13µs ± 2%    1.50µs ± 1%   +32.85%  (p=0.000 n=10+10)

name                                         old speed      new speed      delta
DeduplicateSamples/minScrapeInterval=1s-10   10.0GB/s ± 2%   9.9GB/s ± 3%      ~     (p=0.052 n=10+10)
DeduplicateSamples/minScrapeInterval=2s-10   5.24GB/s ± 1%  3.87GB/s ± 0%   -26.03%  (p=0.000 n=9+7)
DeduplicateSamples/minScrapeInterval=5s-10   6.22GB/s ± 3%  4.96GB/s ± 2%   -20.37%  (p=0.000 n=10+10)
DeduplicateSamples/minScrapeInterval=10s-10  7.28GB/s ± 2%  5.48GB/s ± 1%   -24.74%  (p=0.000 n=10+10)
```

https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3333
Signed-off-by: hagen1778 <roman@victoriametrics.com>

Signed-off-by: hagen1778 <roman@victoriametrics.com>
2022-12-08 18:18:36 -08:00
..
bufferedwriter app/vmselect: do not export NaN values for stale metrics at /federate endpoint 2022-10-01 19:48:21 +03:00
clusternative {app/vmstorage,app/vmselect}: add API to get list of existing tenants (#3348) 2022-11-25 10:32:45 -08:00
deployment Rootless docker images by default (#358) 2020-03-27 21:18:32 +02:00
graphite lib/vmselectapi: pass maxSuffixes arg to tagValueSuffixes RPC call 2022-07-06 12:46:22 +03:00
graphiteql Graphite vmalert wip (#112) 2021-02-01 15:28:30 +02:00
multiarch app: fix make publish-* after ed93330e66 2022-07-14 11:01:34 +03:00
netstorage lib/storage: keep sample with the biggest value on timestamp conflict (#3421) 2022-12-08 18:18:36 -08:00
prometheus {app/vmstorage,app/vmselect}: add API to get list of existing tenants (#3348) 2022-11-25 10:32:45 -08:00
promql app/vmselect/promql: add range_trim_spikes(phi, q) function for trimming phi percent of largest spikes per each time series returned by q 2022-12-05 21:55:24 -08:00
querystats app/vmselect: do not track queries with less than 1ms execution time at /api/v1/status/top_queries 2021-07-15 16:53:35 +03:00
searchutils app/vmselect/searchutils: do not print flag name responsible for query timeout if the timeout isn't reached 2022-12-08 13:08:02 -08:00
vmui app/vmselect/vmui: make vmui-update after 7645d9ae00 2022-12-05 23:10:42 -08:00
main.go app/vmselect: typo fixes in code comments 2022-12-06 20:59:17 -08:00
Makefile app/{vminsert,vmselect,vmstorage}: add package-{vminsert,vmselect,vmstorage}-{goarch} Makefile rules for building arch-specific docker images 2022-10-07 20:17:01 +03:00
README.md app/vmselect: expose vmui at /vmselect/<accountID>/vmui/ instead of /vmselect/<accountID>/prometheus/vmui/ 2021-07-10 12:32:21 +03:00

README.md

vmselect performs the following tasks:

  • Splits incoming selects to tasks for vmstorage nodes and issues these tasks to all the vmstorage nodes in the cluster.

  • Merges responses from all the vmstorage nodes and returns a single response.

The vmui directory contains static contents built from app/vmui package with make vmui-update command. The vmui page is available at http://<vmselect>:8481/select/<accountID>/vmui/.