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From: Shaun Thomas <sthomas@optionshouse.com>
To: Ben Chobot <bench@silentmedia.com>
Cc: pgsql-performance <pgsql-performance@postgresql.org>
Subject: Re: shared_buffers on ubuntu precise
Date: Fri, 30 Nov 2012 14:01:45 -0600
Message-ID: <50B910A9.7000406@optionshouse.com> (raw)
In-Reply-To: <1C168A4E-67B8-40A3-9C45-C79CA363564C@silentmedia.com>
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On 11/30/2012 01:57 PM, Ben Chobot wrote:

> Hm, this sounds like something we should look into. Before we start
> digging do you have more to share, or did you leave it with the "huh,
> that's weird; this seems to fix it" solution?

We're still testing. We're still on the -31 kernel. We tried the -33 
kernel which *might* fix it, but then this happened:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1084264

So now we're testing -34 which is currently proposed. Either way, it's 
pretty clear that Ubuntu's choice of patches to backport is rather 
eclectic and a little wonky, or that nailing down load calculations went 
awry since the NOHZ stuff started, or both. At this point, I wish we'd 
stayed on CentOS.

-- 
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com

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