RE: Oracle Server tuning guide for RAC nodes (2-node and 3-node) with 64-GB and 128GB memory
- From: "Crisler, Jon" <Jon.Crisler@xxxxxxx>
- To: <Pradeep.Chetal@xxxxxxxxxxxxxx>, <tim@xxxxxxxxx>
- Date: Wed, 5 Aug 2009 11:24:54 -0400
The only issue I have ever encountered on these systems is when you are
trying to run multiple processes that use floating point math. An
excellent example is a RMAN backup using backupset compression, or
compress / gzip etc. The processors may have something like 4 / 8 / 16
cores or 32 / 64 threads (I cannot remember exactly) but the actual
number of floating point units is far smaller- if you try to run
something like a massive RMAN with 8 or 16 streams AND compression, you
can bring the system to its knees. Turning off compression brings
things back to normal, or only use compression with 1-4 threads per
actual cpu socket.
There are some Sun performance blogs that contradict my findings, OR
they did not use RMAN compression, but this is my real-world experience.
Other than that, these machines can do some astounding amounts of work-
very impressive and cost effective. They also make great application /
web servers.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Pradeep Chetal
Sent: Tuesday, August 04, 2009 10:31 PM
To: tim@xxxxxxxxx
Cc: Oracle-L Freelists
Subject: RE: Oracle Server tuning guide for RAC nodes (2-node and
3-node) with 64-GB and 128GB memory
Tim,
Thanks. However, I wanted to see if folks on this list have some tunable
parameters for memory of that size, and then we can start from there
with the work loads.
-- Pradeep
-----Original Message-----
From: Tim Gorman [mailto:tim@xxxxxxxxx]
Sent: Tuesday, August 04, 2009 5:44 PM
To: Pradeep Chetal
Cc: Oracle-L Freelists
Subject: Re: Oracle Server tuning guide for RAC nodes (2-node and
3-node) with 64-GB and 128GB memory
One doesn't "tune systems"; one tunes workloads.
Pradeep Chetal wrote:
> Folks
>
> We are working with a customer where we are looking at 2-node and
3-node
> RAC with 64 GB/128GB memory systems. So far our systems were with 32
GB
> memory. These base system are T5240s (Sun T-Series CMT).
>
> If anyone has recommendation for tuning of these large memory systems,
> please reply to me and I can summarize for the list later.
>
> Thanks,
>
> -- Pradeep
>
>
>
>
> Pradeep Chetal
> Sr. Director - Infrastructure Architecture
>
>
>
> Mformation Technologies Inc.
> Switchboard: +1 732 692 6200
>
>
>
> Visit WWW.MFORMATION.COM and see how the MFORMATION SERVICE MANAGER
can help you to transform your business
>
>
> Please consider the environment before printing
> --
> //www.freelists.org/webpage/oracle-l
>
>
>
>
>
Visit WWW.MFORMATION.COM and see how the MFORMATION SERVICE MANAGER can
help you to transform your business
--
//www.freelists.org/webpage/oracle-l
--
//www.freelists.org/webpage/oracle-l
Other related posts:
