During a maintenance window, we upgraded our systems to Postgres 9.0.13 from 9.0.3 running on FreeBSD 8.1 amd64.
When we restarted the postgres server, I notices, and continue to notice, a recurrence of messages in the log.
2013-09-16 21:15:58 MDT LOG: automatic vacuum of table "ishield.public.tbltmptests": could not (re)acquire exclusive lock for truncate scan
2013-09-16 21:15:59 MDT LOG: automatic vacuum of table "ishield.public.tbltmptests": could not (re)acquire exclusive lock for truncate scan
2013-09-16 21:16:00 MDT LOG: automatic vacuum of table "ishield.public.tbltmptests": could not (re)acquire exclusive lock for truncate scan
The tables on which I am seeing this messages are essentially temporary work tables into which we insert records, which are processed by triggers, and then deleted.
Performance of the system does not seem to have been affected by the upgrade.
Is this simply caused by a higher level of verbosity in the autovaccum logging, as a result of the autovacuum fix in 9.0.12?
I did notice that while previously I had issues with vacuum full not being able to run due to not finding an entry in toast tables, this appears to have been resolved.
Thanks in advance,
Benjamin