Re: Sparc T5-4 and LDOM performance

Is it RAC? If it is but your load is not high enough you probably wont hit the problem. In our case we had large load (112 CPU with 60 to 70 runquue) and under that workload we hit a Solaris 11 bug where all RAC RT process contend CPU in a single RT runqueue and literally kills the performance but even with the fix the performance improvement is only roughly 10% over M9000. Compared with other processors such as Intel or IBM Power T5 is not as fast as it seems.

Thanks

On Sat, Jan 18, 2014 at 2:56 PM, Philippe Fierens < philippe_at_fierensconsulting.eu> wrote:

> We did a migration from M9000 to 2 T5-2 and no issues with performance on
> the io domain, when using service domains it depends, small random io
> clearly to a hit, big sequential io was ok ...
>
> I will blog about it shortly...
>
>
> Philippe Fierens
> philippe_at_fierensconsulting.eu
>
>
> pfierens.blogspot.com
>
> On 05 Dec 2013, at 14:19, Ls Cheng <exriscer_at_gmail.com> wrote:
>
> > Hi all
> >
> > Has anyone migrated to Oracle Sparc T5 and running in LDOM (Oracle VM
> for Sparc) and noticed any performance problems?
> >
> > We have migrated a few database from Sun Sparc M9000 to the new T5's and
> the performance is worse, for example running 60000 times select 1 from
> dual using a for loop takes 3 to 5 seconds in T5 where as in M9000 it took
> 2.5 seconds, same test running in several Intel and IBM P6 and P7 all get
> better results (from 1.3 seconds to 2.7 seconds).
> >
> > The test is a bit vague but look like it shows the performance difference
> >
> >
> > Thanks
> >
> >
>
>

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