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app/vmselect/promql: improve documentation for -search.maxPointsPertimeseries command-line flag

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This should reduce incorrect usage and assumptions for this flag.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1020
This commit is contained in:
Aliaksandr Valialkin 2021-01-22 12:59:06 +02:00
parent 7308691865
commit 44c74f1e79
1 changed files with 3 additions and 1 deletions
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4
app/vmselect/promql/eval.go
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@ -20,7 +20,9 @@ import (
var ( var (
disableCache = flag.Bool("search.disableCache", false, "Whether to disable response caching. This may be useful during data backfilling") disableCache = flag.Bool("search.disableCache", false, "Whether to disable response caching. This may be useful during data backfilling")
maxPointsPerTimeseries = flag.Int("search.maxPointsPerTimeseries", 30e3, "The maximum points per a single timeseries returned from the search") maxPointsPerTimeseries = flag.Int("search.maxPointsPerTimeseries", 30e3, "The maximum points per a single timeseries returned from /api/v1/query_range. "+
"This option doesn't limit the number of scanned raw samples in the database. The main purpose of this option is to limit the number of per-series points "+
"returned to graphing UI such as Grafana. There is no sense in setting this limit to values significantly exceeding horizontal resoultion of the graph")
) )
// The minimum number of points per timeseries for enabling time rounding. // The minimum number of points per timeseries for enabling time rounding.