Phoenix Kiula wrote:
I'm on a CentOS 5 OS 64 bit, latest kernel and all of that. PG version is 8.3.7, compiled as 64bit. The memory is 8GB. It's a 2 x Dual Core Intel 5310. Hard disks are Raid 1, SCSI 15 rpm. The server is running just one website. So there's Apache 2.2.11, MySQL (for some small tasks, almost negligible). And then there's PG, which in the "top" command shows up as the main beast. My server load is going to 64, 63, 65, and so on. Where should I start debugging? What should I see? TOP command does not yield anything meaningful. I mean, even if it shows that postgres user for "postmaster" and nobody user for "httpd" (apache) are the main resource hogs, what should I start with in terms of debugging?
If postgres or apache are the reason for the high load, it means you have lots of simultaneous users hitting either server.
The only thing you can do (except of course denying service to the users) is investigate which requests / queries take the most time and optimize them.
pgtop (http://pgfoundry.org/projects/pgtop/) might help you see what is your database doing. You will also probably need to use something like pqa (http://pqa.projects.postgresql.org/) to find top running queries.
Unfortunately, if you cannot significantly optimize your queries, there is not much else you can do with the hardware you have.
-- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
