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docs/Single-server-VictoriaMetrics.md: document -search.treatDotsAsIsInRegexps command-line option

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Aliaksandr Valialkin 2020-11-11 14:59:06 +02:00
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docs/Single-server-VictoriaMetrics.md
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@ -1243,6 +1243,11 @@ VictoriaMetrics also exposes currently running queries with their execution time
This prevents from ingesting metrics with too many labels. It is recommended [monitoring](#monitoring) `vm_metrics_with_dropped_labels_total`
metric in order to determine whether `-maxLabelsPerTimeseries` must be adjusted for your workload.
* If you store Graphite metrics like `foo.bar.baz` in VictoriaMetrics, then `-search.treatDotsAsIsInRegexps` command-line flag could be useful.
By default `.` chars in regexps match any char. If you need matching only dots, then the `\\.` must be used in regexp filters.
When `-search.treatDotsAsIsInRegexps` option is enabled, then dots in regexps are automatically escaped in order to match only dots instead of arbitrary chars.
This may significantly increase performance when locating time series for the given label filters.
* VictoriaMetrics ignores `NaN` values during data ingestion.