RE: Oracle on Sun T2 performance problems

In looking at prtdiag, it comes out as a T5220 with 64 processors, but I believe its really one or two 8-core CPU's. You mention an interesting thing- we are using RMAN compression.  

From: Bradd Piontek [mailto:piontekdd_at_gmail.com] Sent: Tuesday, September 23, 2008 4:24 PM To: srcdco_at_rit.edu
Cc: Crisler, Jon; oracle-l
Subject: Re: Oracle on Sun T2 performance problems  

You may want to make a distinction between a T2000 (which has a T1 chip in it, only on FPU for all the cores) and the T2 chip that ships in the T42XX series of servers (that have a dedicated FPU per core, I believe).  

For RMAN, with a T1 chipset, we saw dismal performance with rman compression (due to the floating point issue). I expect this to be much different on the T2 chips. Oracle licensing between the two is different as well (.25;/core for T1 and .75/core for the T2).

Bradd Piontek
Oracle Blog: http://piontekdd.blogspot.com Linked In: http://www.linkedin.com/in/piontekdd

On Tue, Sep 23, 2008 at 3:18 PM, Scott Canaan <srcdco_at_rit.edu> wrote:

We've added some Sun T2000 series servers to our data center and they are much slower all the way around. We've done benchmark tests on them to prove it. Basically, you get what you pay for. They are cheaper than other Sun servers. According to one of our SAs, the reason that they are so much slower is that they don't do hardware floating point calculations, it's all software. I've even noticed a 3x to 4x slower transfer rate between servers when using scp if even one of the two servers is a T2000 series. We try to put test databases on them and leave production on the other servers.  

Scott Canaan '88 (Scott.Canaan_at_rit.edu)

(585) 475-7886

"Life is like a sewer, what you get out of it depends on what you put into it." - Tom Lehrer.  

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Crisler, Jon Sent: Tuesday, September 23, 2008 4:06 PM To: oracle-l
Subject: Oracle on Sun T2 performance problems  

We are having performance problems with Sun T2 platform, especially with RMAN backups. The database consists of about 75% blobs.  

Has anybody run into major performance problems with RMAN either on a Sun T2 or on a 10g db with lots of blobs ? Our disk I/O has far more i/o capacity than is being used.  

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