influx: docs for retention policy option
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@@ -62,6 +62,7 @@ Read [how to configure](./sql_datasource) SQL data source in Grafana.
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- **Enable**: enable Direct DB Connection.
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- **Data Source**: Select Data Source for Zabbix history database.
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- **Retention Policy** (InfluxDB only): Specify retention policy name for fetching long-term stored data. Grafana will fetch data from this retention policy if query time range suitable for trends query. Leave it blank if only default retention policy used.
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#### Supported databases
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