On 1/6/2014 5:06 PM, Anand Kumar, Karthik wrote:
We run postgres 9.1.11, on Centos 6.3, and an ext2 filesystem
please tell me thats a typo, and you're using ext4, or at least ext3.
We do typically have a lot of idle connections (1500 connections total, over a 1000 idle at any given time). We're in the midst of installing pgbouncer to try and mitigate the problem, but that still doesn't address the root cause.
having 500 not-idle connections is disturbing. depending on the complexities of those 500 active queries, you could be using 500 or 1000 or more times your work_mem setting in temporary buffers on top of your other memory allocations. thats also going to use a LOT of file handles in your kernel. and having 500 active queries competing for your CPU cores, ouch.
I bet you're running out of memory during these busy peaks and going very page-swap bound.
-- john r pierce 37N 122W somewhere on the middle of the left coast -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
