There are a number of housekeeping tasks that you may want to do regularly to ensure optimum system performance. We also recommend you complete some of these housekeeping tasks before upgrading Meridian.
Prior to upgrading
Prune unneeded events
Use vacuumd or cron to regularly prune unneeded events. This helps to clean up your events table, and reduces the amount of data in your backups. We also recommend doing this before you begin the Meridian upgrade process.
For example, run the following to delete events older than six weeks that have no associated outages:
--# this deletes any events that are not associated with outages DELETE FROM events WHERE NOT EXISTS (SELECT svclosteventid FROM outages WHERE svclosteventid = events.eventid UNION SELECT svcregainedeventid FROM outages WHERE svcregainedeventid = events.eventid UNION SELECT eventid FROM notifications WHERE eventid = events.eventid) AND eventtime < now() - interval '6 weeks';
If your Meridian instance fails to start after upgrading, you can run the Fix Karaf script to delete cached items.
The script tries to fix configuration problems by pruning
/opt/opennms/data and restoring all Karaf-related configuration files to a pristine state.
The Fix Karaf script can be destructive to files that may contain user-specific configuration settings.
We recommend that you back up