Out of memory on pg_dump

Hi all -

We are using Postgres 8.2.3 as our Confluence backing store and when
trying to backup the database at night we are seeing this in the logs:

<snip>

pg_amop_opc_strat_index: 1024 total in 1 blocks; 216 free (0 chunks);
808 used

pg_aggregate_fnoid_index: 1024 total in 1 blocks; 392 free (0 chunks);
632 used

MdSmgr: 8192 total in 1 blocks; 6376 free (0 chunks); 1816 used

LOCALLOCK hash: 24576 total in 2 blocks; 14112 free (4 chunks); 10464
used

Timezones: 49432 total in 2 blocks; 5968 free (0 chunks); 43464 used

ErrorContext: 8192 total in 1 blocks; 8176 free (0 chunks); 16 used

2009-08-19 22:35:42 ERROR: out of memory

2009-08-19 22:35:42 DETAIL: Failed on request of size 536870912.

2009-08-19 22:35:42 STATEMENT: COPY public.attachmentdata
(attachmentdataid, attversion, data, attachmentid) TO stdout;

Is there an easy way to give pg_dump more memory? I don't see a command
line option for it and I'm not a Postgres expert by any means. This is
the script we are using to backup our DB (backup.cmd):

@ECHO OFF

SET BACKUPS_DIR=C:\backups

SET PGPASSWORD=*******

REM Set the backup file name

SET prefix=confluence_dbbackup_

SET
basename=%prefix%%date:~-4,4%%date:~-10,2%%date:~-7,2%.%time:~-11,2%.%ti
me:~-8,2%.%time:~-5,2%

SET confluence_backup_path=%BACKUPS_DIR%\%basename%.dump

pg_dump --username=confluence --file="%confluence_backup_path%"
--blobs --format c confluence

Thanks,

Chris




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