Cleanup Options

The number of devices in your LibreNMS install increases with time. The RRD files and the MySQL database also become larger. The database holds the eventlog, the syslog, and the performance data. A large install therefore needs a cleanup of these entries. The cleanup options give you this control.

These options need daily.sh in cron, as in the installation instructions.

lnms config:set eventlog_purge 30
lnms config:set syslog_purge 30
lnms config:set route_purge 10
lnms config:set alert_log_purge 365
lnms config:set authlog_purge 30
lnms config:set ports_fdb_purge 10
lnms config:set ports_nac_purge 10
lnms config:set rrd_purge 0
lnms config:set ports_purge true
lnms config:set networks_purge true

These options purge data that is more than X days old. You can change each option on its own. Each value is a day count.

NOTE: rrd_purge is NOT set by default. This option removes each RRD file that had no update for the set number of days. Enable this option only when you accept this behaviour. LibreNMS updates all active RRD files in each polling period.

Ports Purge

You add devices with time. Some interfaces then need a purge, because they are ignored, bad, or marked as deleted.

To purge all deleted ports, use the web interface or set lnms config:set ports_purge true.

In the web interface, open the Ports tab in the navigation bar. Click "Deleted", then click "Purge all deleted". This action purges all the ports.

Networks Purge

If you add and remove subnets, the database can hold subnets without IP addresses. The networks_purge option removes these unused networks from the database.