| From: | Sven Geisler <sgeisler(at)aeccom(dot)com> |
|---|---|
| To: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
| Cc: | mario(dot)splivalo(at)mobart(dot)hr, "Steinar H(dot) Gunderson" <sgunderson(at)bigfoot(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: scaling up postgres |
| Date: | 2006-06-12 11:21:05 |
| Message-ID: | 448D4E21.3010604@aeccom.com |
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| Thread: | |
| Lists: | pgsql-performance |
Hi all,
Joshua D. Drake schrieb:
> Mario Splivalo wrote:
>> Could you point out to some more detailed reading on why Xeons are
>> poorer choice than Opterons when used with PostgreSQL?
>
> It isn't just PostgreSQL. It is any database. Opterons can move memory
> and whole lot faster then Xeons.
Yes. You can run good old memtest86 and you see the difference.
Here my numbers with memtest86 (blocksize 128 MB).
HP DL580 G3 (4-way XEON MP - DDR RAM) => 670 MByte/sec
FSC RX600 S2 (4-way XEOM MP DC - DDR2-400 PC2-3200) => 1300 MByte/sec
HP DL585 (4-way Opteron DDR2-400 PC2-3200) => 1500 MByte/sec
I used memxfer5b.cpp.
Cheers Sven.
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