Re: new database server build - sanity check

From: Rich Jesse <rjoralist2_at_society.servebeer.com>
Date: Tue, 29 Jan 2013 09:22:49 -0600 (CST)
Message-ID: <4e7947b081e0cca0a95cb50a7b0d88df.squirrel_at_society.servebeer.com>

Mark writes:

> - ZFS can push the kernel CPU utilisation up when writing - during periods
> of intense writing..ie..RMAN backup..we can see the kernel CPU utilisation
> going up to 40% so you need to allow for this additional overhead.

Are you sure the extra CPU is due to ZFS overhead? We have the same on AIX and JFS2. I reasoned that it was just the RMAN compression, which should be CPU intensive.

Rich

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Received on Tue Jan 29 2013 - 16:22:49 CET

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