Last week by a customer, we experienced an excessive redo log generation filling up rapidly the FRA (Flash/Fast Recovery Area) with archivelog files which caused the database to crash.
The Metalink note 949858.1 describes problems with 10.2.0.5 agents monitoring 11g databases – this might be the case if you have an “old” 10.2.0.5 Grid Infrastructure you did not want to upgrade yet. The 11g databases are generating errors in both the alert.log and the log.xml file. The agent 10.2.0.5 agent seems to have problem with this. This posting will show you what to do.