| From: | James Cloos <cloos(at)jhcloos(dot)com> |
|---|---|
| To: | Glyn Astill <glynastill(at)yahoo(dot)co(dot)uk> |
| Cc: | Steve Clark <sclark(at)netwolves(dot)com>, david(at)lang(dot)hm, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Linux: more cores = less concurrency. |
| Date: | 2011-04-11 20:39:46 |
| Message-ID: | m3k4f034k5.fsf@jhcloos.com |
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| Lists: | pgsql-performance |
>>>>> "GA" == Glyn Astill <glynastill(at)yahoo(dot)co(dot)uk> writes:
GA> I was hoping someone had seen this sort of behaviour before,
GA> and could offer some sort of explanation or advice.
Jesper's reply is probably most on point as to the reason.
I know that recent Opterons use some of their cache to better manage
cache-coherency. I presum recent Xeons do so, too, but perhaps yours
are not recent enough for that?
-JimC
--
James Cloos <cloos(at)jhcloos(dot)com> OpenPGP: 1024D/ED7DAEA6
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