Re: Sparc T5-4 and LDOM performance

From: Harmandeep Singh <singh.bedi_at_gmail.com>
Date: Mon, 20 Jan 2014 18:03:51 +0530
Message-ID: <CAEWC_QCaya5347VLei+71s=A=jTYV1KxG2MaWbqML6+3Hf_4rA_at_mail.gmail.com>

We were facing similar issues on the VMs of vmware during performance testing of Oracle on Windows. After moving to the Physical machines, there is 10-15% improvement. Additional virtual layer decreases performance as it leads to additional processing layer .

In my opinion, VM are good for test and development environments and not suitable for Production systems where every millisecond counts

Thanks,
Harman

On Mon, Jan 20, 2014 at 5:33 AM, Ls Cheng <exriscer_at_gmail.com> wrote:

> Hi
>
> 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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Received on Mon Jan 20 2014 - 13:33:51 CET