Re: Hugetables question

On Sun, Jun 19, 2011 at 12:56, Radosław Smogura
<rsmogura@softperience.eu> wrote:
> I want to implement hugepages for shared memory

Hi,

Have you read this post by Tom Lane about the performance estimation
and a proof-of-concept patch with hugepages?
http://archives.postgresql.org/pgsql-hackers/2010-11/msg01842.php

It's possible that there was a flaw in his analysis, but his
conclusion is that it's not worth it:

> And the bottom line is: if there's any performance benefit at all,
> it's on the order of 1%.  The best result I got was about 3200 TPS
> with hugepages, and about 3160 without.  The noise in these numbers
> is more than 1% though.

Regards,
Marti