What job runs AWR snapshot? Eh?
October 27, 2011 5 Comments
There are a surprising number of online resources propagating the idea that the collecting of AWR snapshots is somehow connected to the GATHER_STATS_JOB (which was responsible for automatically gathering stats in 10g).
Collecting AWR snapshots is one of the responsibilities of the background process MMON.
If you have a problem with the automatic snapshots:
- Check whether you can manually snap using DBMS_WORKLOAD_REPOSITORY.CREATE_SNAPSHOT.
- Check MMON and alert log / trace files for related messages.
- See Metalink note 1301503.1: “Troubleshooting: AWR Snapshot Collection issues”
This came up in a question on the OTN forums where the OP said that AWR was not snapping automatically but the GATHER_STATS_JOB seemed to be ok. And the obvious first question would be where did you get that idea from?
Sometimes you can’t win on the forums. If you ask a question, it’s not uncommon to be pointed to a google search. But if you google something, you can’t trust everything that’s out there – it gets outdated and sometimes it never was accurate.