Re: Shared Memory Sizing - Mailing list pgsql-general

On Thu, Jun 27, 2002 at 11:27:33AM -0400, Jan Wieck wrote:

> Here I disagree. The more shared buffer cache you have, the bigger the
> percentage of your database that neither causes read()'s nor memory
> copying from the OS buffer cache.

For what it's worth, truss on Solaris 7 indicates that copying from
OS buffer costs a few milliseconds (between 2 and 8 in our tests,
depending on load), at least in our tests.

A

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