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Date: Thu, 19 Sep 2002 11:26:59 +0100 (BST)
From: Matthew Kirkwood <matthew@hairy.beasts.org>
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To: "Bond, Andrew" <Andrew.Bond@hp.com>
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Subject: Re: Linux TPC-C performance aided by kernel features
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On Wed, 18 Sep 2002, Bond, Andrew wrote:

> 2. Large memory support (16GB) - The Oracle processes used about 14GB
> of shared memory which was allocated using shmfs and managed through a
> mapping window in the Oracle process space.  Databases always love
> more memory, however in an IA-32 architecture the gains definitely
> diminish once you get past 4GB because of overhead.  Our gains going
> from 8GB to 16GB of memory in the system were in the 10% range.

What did the gains from 4 to 8GB look like?

Could going above 4GB be a performance loss on less busy systems?
#
Matthew.

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