On Tue, Sep 22, 2009 at 1:36 PM, Alan McKay <alan(dot)mckay(at)gmail(dot)com> wrote:
> Too high? How high is too high?
in a very simple scenario, you have 100 connections opened, and all of
them run the query that was the reason you bumped work_mem to 256M.
All of the sudden postgresql starts to complain about lack of ram,
because you told it it could use max of
work_mem*number_of_connections.
Best practice to avoid that, is to bump the work_mem temporarily
before the query, and than lower it again, lowers the chance of memory
exhaustion.
--
GJ