Skip site navigation (1) Skip section navigation (2)

Re: [PERFORM] About “context-switching issue on Xe?==?GB2312?Q?on” test case ?

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: Greg Smith <greg(at)2ndquadrant(dot)com>
Cc: RD黄永卫 <yongwei_huang(at)temp(dot)gtmc(dot)com(dot)cn>, pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] About “context-switching issue on Xe?==?GB2312?Q?on” test case ?
Date: 2010-04-11 15:43:17
Message-ID: k2wdcc563d11004110843w103f22rac80d197e04e1574@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
2010/4/10 Greg Smith <greg(at)2ndquadrant(dot)com>:
> Scott Marlowe wrote:
>> For 2 sockets Intel rules the roost.  I'd imagine AMD's much faster
>> bus architecture for >2 sockets would make them the winner, but I
>> haven't had a system like that to test, either Intel or AMD.
>>
>
> AMD has been getting such poor performance due to the RAM they've been
> using (DDR2-800) that it really doesn't matter--Intel has been thrashing
> them across the board continuously since the "Nehalem" processors became
> available, which started in volume in 2009.

Considering the nehalems are only available (or were at least) in two
socket varieties, and that opterons have two channels per socket
wouldn't the aggregate performance of 8 sockets x 2 channels each beat
the 2 sockets / 3 channels each?

In response to

pgsql-performance by date

Next:From: CorinDate: 2010-04-11 21:12:30
Subject: planer chooses very bad plan
Previous:From: Kevin GrittnerDate: 2010-04-11 12:44:25
Subject: Re: Some question

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group