From: Bruce Momjian <bruce@momjian.us>
To: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: Greg Smith <greg@2ndQuadrant.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Linux memory zone reclaim
Date: Mon, 30 Jul 2012 13:26:58 -0400
Message-ID: <20120730172658.GD10876@momjian.us> (raw)
In-Reply-To: <501673680200002500049227@gw.wicourts.gov>
References: <500616CB.3070408@2ndQuadrant.com>
<501673680200002500049227@gw.wicourts.gov>
> 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@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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To: pgsql-performance@postgresql.org
Cc: bruce@momjian.us, Kevin.Grittner@wicourts.gov, greg@2ndQuadrant.com
Subject: Re: Linux memory zone reclaim
In-Reply-To: <20120730172658.GD10876@momjian.us>
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