Re: DBWR performance

From: <>
Date: Sun, 20 May 2012 11:39:39 -0700 (PDT)
Message-ID: <>

Is there oracle use case with timing before and after the change where it helped?


On Sunday, May 20, 2012 1:21:42 PM UTC-5, Mladen Gogala wrote:
> On Wed, 09 May 2012 08:34:38 -0700, andrew.protasov wrote:
> > Apparently all results were with deadline scheduler in place. I did this
> > before the first test:
> >
> > tuned-adm profile enterprise-storage
> >
> > and it installed the scheduler.
> >
> > Andrew
> Tuned is showing a lot of promise, but I don't think it's there yet. I
> use preload on my Ubuntu laptop and the effects are less than staggering.
> With a single-purpose machine like a database server, I prefer doing the
> tuning myself. On such machines, I am turning off the OOM killer by
> setting vm.overcommit_memory to 1, I usually increase the amount of
> available free memory by setting min_free_kbytes and swappiness to 60. I
> don't really trust all those AI tuning daemons when it comes to a single
> purpose machine. If you have a racing car, then you don't want a tuning
> daemon that will tune it so that the oil lasts for 1000 miles and that
> tires last for 2 years. You want the car to go as fast as possible and
> win the race, to heck with the tires and oil. I don't have much faith in
> the NI (Natural Intelligence) either, much less in the form of
> intelligence created by the members of the same species as Meg Whitman or
> Lindsay Lohan.
Received on Sun May 20 2012 - 13:39:39 CDT

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