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"canceling autovacuum time" - Mailing list pgsql-general

From Jameison Martin
Subject "canceling autovacuum time"
Date
Msg-id 1330390381.50699.YahooMailNeo@web39402.mail.mud.yahoo.com
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Responses Re: "canceling autovacuum time"
Re: "canceling autovacuum time"
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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.

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