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docs/Single-server-VictoriaMetrics.md: mention that -search.maxStalenessInterval can be useful for InfluxDB and TimescaleDB users

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Aliaksandr Valialkin 2020-04-24 16:22:50 +03:00
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docs/Single-server-VictoriaMetrics.md
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@ -927,6 +927,10 @@ The most interesting metrics are:
If the gaps are related to irregular intervals between samples, then try adjusting `-search.minStalenessInterval` command-line flag
to value close to the maximum interval between samples.
* If you are switching from InfluxDB or TimescaleDB, then take a look at `-search.maxStalenessInterval` command-line flag.
It may be needed in order to suppress default gap filling algorithm used by VictoriaMetrics - by default it assumes
each time series is continuous instead of discrete, so it fills gaps between real samples with regular intervals.
* Metrics and labels leading to high cardinality or high churn rate can be determined at `/api/v1/status/tsdb` page.
See [these docs](https://prometheus.io/docs/prometheus/latest/querying/api/#tsdb-stats) for details.
VictoriaMetrics accepts optional `date=YYYY-MM-DD` and `topN=42` args on this page. By default `date` equals to the current date,