Re: Negative ramifications of setting CPU_COUNT lower?

From: Greg Rahn <>
Date: Fri, 6 Nov 2009 08:33:34 -0800
Message-ID: <>

Reducing the cpu_count is fine and at least I advise people to set it on the CMT boxes to the core, not the thread count if it is the only DB on the box. Since you have 55 then it should be fine to reduce it even further.

When 11.2 is released for Solaris you can use cpu_count with resource manger to do instance caging as well.

On Fri, Nov 6, 2009 at 6:46 AM, Charles Schultz <> wrote:
> Good day,
> We recently moved 55 databases from a Sun F15K to a Sun T5440. You can
> imagine what happened next. =)
> Reading Glenn Fawcett's blog, we indeed see that CPU_COUNT = 256. I have
> filed an SR with Oracle, but as I wait I am curious if those of you in the
> know could tell me what are the negative ramifications of resetting
> CPU_COUNT. If we go forward with this action, I want to do so in an informed
> manner, and not simply shooting in the dark.
> Thanks.
> --
> Charles Schultz

Greg Rahn
Received on Fri Nov 06 2009 - 10:33:34 CST

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