Re: Abnormal performance difference between Postgres and MySQL - Mailing list pgsql-performance

From Farhan Husain
Subject Re: Abnormal performance difference between Postgres and MySQL
Date
Msg-id 3df32b6d0902251244t416c0c68p37833891bb908045@mail.gmail.com
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In response to Re: Abnormal performance difference between Postgres and MySQL  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: Abnormal performance difference between Postgres and MySQL
List pgsql-performance


On Wed, Feb 25, 2009 at 1:52 PM, Robert Haas <robertmhaas@gmail.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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