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Re: Autovacuum running out of memory

From: Richard Huxton <dev(at)archonet(dot)com>
To: Jason Lustig <lustig(at)brandeis(dot)edu>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Autovacuum running out of memory
Date: 2007-10-16 12:23:12
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
Jason Lustig wrote:
> There isn't any more error message than this... it simply repeats every 
> minute or so, which is really quite strange. And the user & db is really 
> blank in the log, I didn't trim it (if I did I would have replaced it 
> with dummy values).

Hmm - odd that you're not getting any connection details.

> I'm using pg 8.2.4 on Linux 2.6.15.

Fair enough.

>>> Oct 16 06:43:47 [2897]: [1-1]  user=,db= ERROR:  out of memory
>>> Oct 16 06:43:47 [2897]: [1-2]  user=,db= DETAIL:  Failed on request 
>>> of size 524287998.

Well, since this is about 500MB and your maintenance_work_mem is set to 
500MB that's the obvious place to start. It might just be that you've 
not got enough free memory.

What happens if you set maintenance_work_mem to say 50MB?

   Richard Huxton
   Archonet Ltd

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