Re: Beginner optimization questions, esp. regarding

On Tue, 15 Aug 2006 12:47:54 -0600
"Carl Youngblood" <carl(at)youngbloods(dot)org> wrote:

> I tried setting it to 2GB and postgres wouldn't start. Didn't
> investigate in much greater detail as to why it wouldn't start, but
> after switching it back to 1GB it started fine.
>
> On 8/15/06, Jim C. Nasby <jnasby(at)pervasive(dot)com> wrote:
> > See the recent thread about how old rules of thumb for
> > shared_buffers are now completely bunk. With 4G of memory, setting
> > shared_buffers to 2G could easily be reasonable. The OP really
> > needs to test several different values with their actual workload
> > and see what works best.

Sounds like you need to increase your kernel's maximum amount
of shared memory. This is typically why an increase in
shared_buffers causes PostgreSQL not to start.

Check out this page in the docs for more information:

http://www.postgresql.org/docs/8.1/static/kernel-resources.html

---------------------------------
Frank Wiles <frank(at)wiles(dot)org>
http://www.wiles.org
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