Re: select count() out of memory - Mailing list pgsql-general

From Gregory Stark
Subject Re: select count() out of memory
Date
Msg-id 87hckfl9ca.fsf@oxford.xeocode.com
Whole thread Raw
In response to Re: select count() out of memory  (tfinneid@student.matnat.uio.no)
Responses Re: select count() out of memory
List pgsql-general
<tfinneid@student.matnat.uio.no> writes:

> max_connections = 1000

Do you actually have anywhere near this number of processes? What is your
setting for work_mem? Keep in mind every process could use as much as work_mem
and actually it's possible to use that much several times over.

Also, what is your maintenance_work_mem and do you have many vacuums or other
such commands running at the time?

1,000 processes is a large number of processes. You may be better off
re-architecting to run fewer processes simultaneously. But if that's not
possible you'll have to keep it in mind to tune other things properly.

--
  Gregory Stark
  EnterpriseDB          http://www.enterprisedb.com

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