Re: Xeon vs Opteron - tests and questions

That link isn't working for me, but if you're seeing 'spikey'
performance I'd bet that you need to change the bg_writer settings to
make it more aggressive, especially if you're seeing performance drops
every 5 minutes (assuming default checkpoint settings).

You might also want to up wal_buffers and maybe checkpoint_segments.

On Wed, Nov 09, 2005 at 03:26:51PM +0100, Marcin Giedz wrote:
> Hello.
>
>
> I made some test comparing postgresql 8.0.4 based on two servers.
>
> Here is a link:
> http://85.128.68.44/
>
>
> From my point of view it seems like:
>     - with opteron I found that it works very FAST periodicaly, why??? Maybe I
> did something wrong or.....
>     - xeon seems to work almost all time on the same level but has much less
> performance than opteron. Is it normal?
>
> Did anyone has similar tests/results?
>
> BR,
> Marcin
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match
>

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Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
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