Re: Linux TPC-C performance aided by kernel features

From: Matthew Kirkwood (
Date: Thu Sep 19 2002 - 05:26:59 EST

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?

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