Re: Power saving mode on Dells and poor database performance
Date: Fri, 11 Dec 2015 09:46:53 -0800
Message-ID: <CAKsxbLqbHU87QhPQA0-E+8rHyBySqocy2+4YehFDKNH953vXVA_at_mail.gmail.com>
Interesting. But are you saying you this R730 box as a VM ware box? Seems like a small server to carve up into little virtual servers.
On Fri, Dec 11, 2015 at 2:17 AM, John Thomas <jt2354_at_gmail.com> wrote:
> OK, this is embarrassing. (For Dell or Intel?)
>
> We've just identified that BIOS settings on our Dell PowerEdge R730 had
> not been set as we thought and were actually set to "Performance per watt"
> mode. Turns out this backs off CPU to 1GHz from 3.3GHz and even shuts cores
> down.
>
> Setting this to Performance mode has dramatically improved the run time of
> some big batch processes, and brought average CPU utilisation down from
> around 40-50% to 10-15%. The CPUs were essentially going to sleep while
> inactive.
>
> A VMWare tool was involved. It had been used to propagate the BIOS
> settings. Apparently the Dells accepted the settings, appeared to be set to
> Performance mode but due to a BIOS bug were still implementing Power
> Saving. Some of our processes now run in half the time they did yesterday.
>
> Regards,
>
> J
>
>
>
-- http://www.freelists.org/webpage/oracle-lReceived on Fri Dec 11 2015 - 18:46:53 CET