From: Shaun Thomas <sthomas@optionshouse.com>
To: Midge Brown <midgems@sbcglobal.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: Two Necessary Kernel Tweaks for Linux Systems
Date: Tue, 8 Jan 2013 12:28:25 -0600
Message-ID: <50EC6549.3090503@optionshouse.com> (raw)
In-Reply-To: <B994348460014EC7BA65F310E9D30EBD@BERNICE>
References: <50E4AAB1.9040902@optionshouse.com>
<B994348460014EC7BA65F310E9D30EBD@BERNICE>
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On 01/08/2013 12:25 PM, Midge Brown wrote:
> The kernel on our Linux system doesn't appear to have these two
> settings according to the list provided by sysctl -a. Please pardon
> my ignorance, but should I add them?
Sorry if I wasn't more clear. These only apply to Linux systems with the
Completely Fair Scheduler, as opposed to the O(1) scheduler. For all
intents and purposes, this means 3.0 kernels and above.
With a 2.6 kernel, you're fine.
Effectively these changes fix what is basically a performance regression
compared to older kernels.
--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
312-444-8534
sthomas@optionshouse.com
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To: pgsql-performance@postgresql.org
Cc: sthomas@optionshouse.com, midgems@sbcglobal.net
Subject: Re: Two Necessary Kernel Tweaks for Linux Systems
In-Reply-To: <50EC6549.3090503@optionshouse.com>
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