From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> |
Cc: | Greg Smith <greg(at)2ndQuadrant(dot)com>, pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Linux memory zone reclaim |
Date: | 2012-07-30 17:26:58 |
Message-ID: | 20120730172658.GD10876@momjian.us |
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Thread: | |
Lists: | pgsql-performance |
> node distances:
> node 0 1 2 3
> 0: 10 11 11 11
> 1: 11 10 11 11
> 2: 11 11 10 11
> 3: 11 11 11 10
>
> When considering a hardware purchase, it might be wise to pay close
> attention to how "far" a core may need to go to get to the most
> "distant" RAM.
Yikes, my server is certainly asymmetric:
node distances:
node 0 1
0: 10 21
1: 21 10
and my Debian Squeeze certainly knows that:
$ cat < /proc/sys/vm/zone_reclaim_mode
1
Server specs:
http://momjian.us/main/blogs/pgblog/2012.html#January_20_2012
I have 12 2GB DDR3 DIMs.
Of course, my home server is ridiculously idle too. :-)
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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