| From: | Greg Smith <gsmith(at)gregsmith(dot)com> |
|---|---|
| To: | Guillaume Smet <guillaume(dot)smet(at)gmail(dot)com> |
| Cc: | pgsql-performance <pgsql-performance(at)postgresql(dot)org>, Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>, Devrim GÜNDÜZ <devrim(at)commandprompt(dot)com> |
| Subject: | Re: More shared buffers causes lower performances |
| Date: | 2007-12-26 23:35:33 |
| Message-ID: | Pine.GSO.4.64.0712261816520.16448@westnet.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Wed, 26 Dec 2007, Guillaume Smet wrote:
> beta RPMs are by default compiled with --enable-debug and
> --enable-cassert which doesn't help them to fly fast...
Got that right. Last time I was going crazy after running pgbench with
those options and not having realized what I changed, I was getting a 50%
slowdown on results that way compared to without the debugging stuff.
Didn't realize it scaled with shared_buffers though.
> Really sorry for the noise
Nothing to be sorry for, I know I wasn't aware the beta RPMs were compiled
that way. Probably need to put a disclaimer about that fact *somewhere*.
It's unfortunate for you, but I know I'm glad you run into it rather than
someone who wouldn't have followed through to figure out the cause.
--
* Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD
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