Re: BUG #5675: out of memory at request size 32Mb

On Fri, Sep 24, 2010 at 8:42 AM, Andreas Pflug
<pgadmin@pse-consulting.de> wrote:
>
> The following bug has been logged online:
>
> Bug reference: =A0 =A0 =A05675
> Logged by: =A0 =A0 =A0 =A0 =A0Andreas Pflug
> Email address: =A0 =A0 =A0pgadmin@pse-consulting.de
> PostgreSQL version: 8.4.4
> Operating system: =A0 Linux 2.6.26 i686
> Description: =A0 =A0 =A0 =A0out of memory at request size 32Mb
> Details:
>
> A slony 2.0 cluster running for a year, no config changes lately. Slony h=
as
> to replicate a table with a bytea column; maximum so far was a little over
> 32MB.
>
> Lately, the slave's slon process fails to replicate. The server reports "=
out
> of memory", "Failed on request of size 33554432.". The slon log shows an
> insert was the failing statement, the server log spits out its memory
> contexts but not the failing statement.
>
> One log line that catched my attention was
> MessageContext: 485902696 total in 6 blocks; 32160 free (16 chunks);
> 485870536 used
> which is well beyond the configured memory limits (280MB shared_buffers,
> temp 32MB, workmem 64MB)

Are you sure you meant to report this here?  Seems likely to be a
Slony issue, although of course I'm not sure of that.

--=20
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company