Re: How to troubleshoot high mem usage by postgres?

[Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>]

On 28/02/2010 6:29 AM, Chris wrote:

> If I am indeed doing everything I can to release the resources (and
> I'm 95% sure I am) then it looks like the pgsql extension is at fault
> here.

Before assuming some particular thing is at fault, you need to collect 
some information to determine what is actually happening.

What are your queries?

What are the resource-releasing functions you're using, and how?

Can you boil this down to a simple PHP test-case that connects to a 
dummy database and repeats something that causes the backend to grow in 
memory usage? Trying to do this - by progressively cutting things out of 
your test until it stops growing - will help you track down what, 
exactly, is causing the growth.

It'd be helpful if you could also provide some general system 
information, as shown here:

   http://wiki.postgresql.org/wiki/Guide_to_reporting_problems

--
Craig Ringer