| From: | Farhan Husain <russoue(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Abnormal performance difference between Postgres and MySQL |
| Date: | 2009-02-25 20:44:26 |
| Message-ID: | 3df32b6d0902251244t416c0c68p37833891bb908045@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-performance |
On Wed, Feb 25, 2009 at 1:52 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> > Please note that this (1792MB) is the highest that I could set for
> work_mem.
>
> Yeah, that's almost certainly part of your problem.
>
> You need to make that number MUCH smaller. You probably want a value
> like 1MB or 5MB or maybe if you have really a lot of memory 20MB.
>
> That's insanely high.
>
> ...Robert
>
Initially, it was the default value (32MB). Later I played with that value
thinking that it might improve the performance. But all the values resulted
in same amount of time.
--
Mohammad Farhan Husain
Research Assistant
Department of Computer Science
Erik Jonsson School of Engineering and Computer Science
University of Texas at Dallas
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