From: | Greg Stark <gsstark(at)mit(dot)edu> |
---|---|
To: | William Yu <wyu(at)talisys(dot)com> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Pg+Linux swap use |
Date: | 2003-11-02 16:33:03 |
Message-ID: | 87y8uy91ds.fsf@stark.dyndns.tv |
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Thread: | |
Lists: | pgsql-performance |
William Yu <wyu(at)talisys(dot)com> writes:
> Rob Sell wrote:
>
> > Not being one to hijack threads, but I haven't heard of this performance hit
> > when using HT, I have what should all rights be a pretty fast server, dual
> > 2.4 Xeons with HT 205gb raid 5 array, 1 gig of memory. And it is only 50% as
> > fast as my old server which was a dual AMD MP 1400's with a 45gb raid 5
> > array and 1gb of ram.
>
> Not to get into a big Intel vs AMD argument but 50% sounds about right. Let's
> first assume that the QS rating for the MP1400 is relatively accurate and
> convert that to a 1.4GHz Xeon. 2.4/1.4 = +71%. Since processor performance
> does not increase linearly with clockspeed, 50% is in line with expectations.
Hm. You've read "50% as fast" as "50% faster".
I wonder which the original poster intended.
--
greg
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