| From: | Sven Geisler <sgeisler(at)aeccom(dot)com> |
|---|---|
| To: | Guillaume Smet <guillaume(dot)smet(at)gmail(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: PostgreSQL and Xeon MP |
| Date: | 2006-03-16 16:36:52 |
| Message-ID: | 44199424.1080107@aeccom.com |
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| Lists: | pgsql-performance |
Hi Guillaume,
Guillaume Smet schrieb:
>> How much faster is the XEON DP?
>
> Well, on high load, PostgreSQL scales well on the DP (load at 40,
> queries slower but still performing well) and is awfully slow on the
> MP box.
I know what you mean with awfully slow.
I think, your application is facing contention. The contention becomes
larger as more CPU you have. PostgreSQL 8.1 is addressing contention on
multiprocessor servers as you mentioned before.
I guess, you will see that your 4-way XEON MP isn't that bad if you
compare both servers with the same PostgreSQL version.
Regards
Sven.
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