| From: | "Luke Lonergan" <llonergan(at)greenplum(dot)com> |
|---|---|
| To: | "Vivek Khera" <vivek(at)khera(dot)org>, "Pgsql-Performance ((E-mail))" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Performances with new Intel Core* processors |
| Date: | 2006-08-01 04:26:57 |
| Message-ID: | C0F42621.2B69F%llonergan@greenplum.com |
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| Lists: | pgsql-performance |
Vivek,
On 7/31/06 2:04 PM, "Vivek Khera" <vivek(at)khera(dot)org> wrote:
> No, but it *does* matter how fast said processor can sling the memory
> around, and in my experience, the opterons have been much better at
> that due to the efficiency of the memory transport layer.
My Mac laptop with a Core 1 and DDR2 RAM does 2700 MB/s memory bandwidth.
The Core 2 also has lower memory latency than the Opteron.
That said - Intel still hasn't figured out how to do cache-coherent SMP
scaling yet - the Opteron has the outstanding EV6/HTX bus and the cc-numa
cache coherency logic working today.
- Luke
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