I'm seeing "GMTERROR: canceling autovacuum task" lines in my logs.
2012-02-27 23:53:28 GMTLOG: checkpoint starting: time
>2012-02-27 23:53:31 GMTERROR: canceling autovacuum task
>2012-02-27 23:53:31 GMTCONTEXT: automatic vacuum of table
>"<somedb>.pg_toast.pg_toast_33254"
>2012-02-27 23:53:32 GMTERROR: canceling autovacuum task
>2012-02-27 23:53:32 GMTCONTEXT: automatic vacuum of table
>"<somedb>.pg_toast.pg_toast_33485"
>2012-02-27 23:54:29 GMTLOG: automatic vacuum of table
>"<somedb>.pg_toast.pg_toast_33254": index scans: 1
It was suggested to me that perhaps I had an exclusive lock on the table that
was being vacuumed (e.g. that I was running some DDL that was conflicting with
the autovacuum). I'm quite certain that I'm not running any DDL at the time
this happens, all i'm running are:
* SELECT ... FOR UPDATE
* UPDATE
* INSERT
* DELETE
Does anyone have a suggestions as to what the cause of this error might be?
I'm using Postgres 9.0.
Thanks.
