Noticed because we've been having some random DB failovers. Event log shows EventID 122 (Database copy on this server experienced a corrupted search catalog).For these DBs done an update-mailboxdatabasecopy -catalogonly.
BUT, have noticed that CIBacklog is very high for some of the DBs, and CIRetryQueueSize is high for ALL DBs on this server. Other servers are fine it appears. Checking periodically, the numbers do start to go down but then shoot back up again.
Best approach? Tried doing a complete reseed of the passive DBs but still the same.