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
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