Kiu/VictoriaMetrics
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VictoriaMetrics/app/vmselect
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Aliaksandr Valialkin 9661918bb4
app/vmselect/promql: optimize repeated SLI-like instant queries with lookbehind windows >= 1d 
Repeated instant queries with long lookbehind windows, which contain one of the following rollup functions,
are optimized via partial result caching:

- sum_over_time()
- count_over_time()
- avg_over_time()
- increase()
- rate()

The basic idea of optimization is to calculate

  rf(m[d] @ t)

as

  rf(m[offset] @ t) + rf(m[d] @ (t-offset)) - rf(m[offset] @ (t-d))

where rf(m[d] @ (t-offset)) is cached query result, which was calculated previously

The offset may be in the range of up to 1 hour.
2023-10-31 20:08:38 +01:00
..
clusternative app/vmselect: move common http functionality from app/vmselect/searchutils to lib/httputils 2023-07-06 17:22:23 -07:00
deployment Rootless docker images by default (#358) 2020-03-27 21:18:32 +02:00
graphite all: consistently use %w instead of %s in when error is passed to fmt.Errorf() 2023-10-26 09:44:40 +02:00
graphiteql app,lib: fix typos in comments (#3804) 2023-02-13 09:32:35 -08:00
multiarch all: run apk update && apk upgrade in base Alpine Docker image in order to get all the recent security fixes 2023-02-09 14:03:02 -08:00
netstorage app/vmselect: limit the number of parallel workers by 32 (#5195) 2023-10-26 09:15:27 +02:00
prometheus all: consistently use %w instead of %s in when error is passed to fmt.Errorf() 2023-10-26 09:44:40 +02:00
promql app/vmselect/promql: optimize repeated SLI-like instant queries with lookbehind windows >= 1d 2023-10-31 20:08:38 +01:00
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 all: add support for or filters in series selectors 2023-07-15 23:56:18 -07:00
static/css app/vmselect: properly serve static css for /select/.../metric-relabel-debug page 2022-12-10 03:04:43 -08:00
vmui app/vmui: change the order of tables at Top queries tab 2023-10-28 11:57:08 +02:00
main.go app/vmselect: follow-up for 348c1bcec0: cache static contents served from /select/tenantID/prometheus/vmui/static/... 2023-10-16 23:27:06 +02:00
Makefile all: add Windows build for VictoriaMetrics 2023-03-19 23:28:26 -07:00
README.md app/vmselect: expose vmui at /vmselect/<accountID>/vmui/ instead of /vmselect/<accountID>/prometheus/vmui/ 2021-07-10 12:32:21 +03:00
vmui.go lib/fs: add MustReadDir() function 2023-04-14 22:11:40 -07:00

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/.