Re: More shared buffers causes lower performances

[Greg Smith <gsmith(at)gregsmith(dot)com>]

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