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I’ve been getting database out of memory failures with
some queries which deal with a reasonable amount of data. I was wondering what I should be looking at to stop this
from happening. The typical messages I been getting are like this: http://pastebin.com/Jxfu3nYm The OS is: Linux TSTLHAPP01 2.6.32-29-server #58-Ubuntu SMP Fri Feb 11
21:06:51 UTC 2011 x86_64 GNU/Linux. It’s a running on VMWare and, has 2 CPU’s and
8GB of RAM. This VM is dedicated to PostgreSQL. The main OS parameters I have tuned
are: vm.swappiness=0 vm.overcommit_memory=2 kernel.shmmax = 4196769792 kernel.shmall = 1024602 And the PostgreSQL is: PostgreSQL 9.0.3 on x86_64-pc-linux-gnu, compiled by GCC
gcc-4.4.real (Ubuntu 4.4.3-4ubuntu5) 4.4.3, 64-bit. The main changed psql parameters I’ve tuned are: shared_buffers = 2048MB maintenance_work_mem = 512MB work_mem = 200MB wal_buffers = 16MB effective_cache_size = 4094MB I have also try lowering the shared_buffers down to
1GB but it still ran out of memory. Cheers, Jeremy This message contains information, which is confidential and may be subject
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