diff --git a/docs/Cluster-VictoriaMetrics.md b/docs/Cluster-VictoriaMetrics.md index 9adcaeea9..edfe8f843 100644 --- a/docs/Cluster-VictoriaMetrics.md +++ b/docs/Cluster-VictoriaMetrics.md @@ -77,7 +77,7 @@ or [vmgateway](https://docs.victoriametrics.com/vmgateway/). [Contact us](mailto - Data for all the tenants is evenly spread among available `vmstorage` nodes. This guarantees even load among `vmstorage` nodes when different tenants have different amounts of data and different query load. -- The database performance and resource usage doesn't depend on the number of tenants. It depends mostly on the total number of active time series in all the tenants. A time series is considered active if it received at least a single sample during the last hour or it has been touched by queries during the last hour. +- The database performance and resource usage doesn't depend on the number of tenants. It depends mostly on the total number of [active time series](https://docs.victoriametrics.com/faq/#what-is-an-active-time-series) in all the tenants. A time series is considered active if it received at least a single sample during the last hour or it has been touched by queries during the last hour. - The list of registered tenants can be obtained via `http://:8481/admin/tenants` url. See [these docs](#url-format). diff --git a/docs/FAQ.md b/docs/FAQ.md index 33066a1ea..a9a12e5b5 100644 --- a/docs/FAQ.md +++ b/docs/FAQ.md @@ -315,7 +315,7 @@ Yes. See [these docs](https://docs.victoriametrics.com/#graphite-api-usage). ## What is an active time series? A time series is uniquely identified by its name plus a set of its labels. For example, `temperature{city="NY",country="US"}` and `temperature{city="SF",country="US"}` -are two distinct series, since they differ by the `city` label. A time series is considered active if it receives at least a single new sample during the last hour. +are two distinct series, since they differ by the `city` label. A time series is considered active if it received at least a single sample during the last hour or it has been touched by queries during the last hour. The number of active time series is displayed on the official Grafana dashboard for VictoriaMetrics - see [these docs](https://docs.victoriametrics.com/#monitoring) for details. ## What is high churn rate?