Re: Concurrency Issues with ASM on CX500/EMC and RAC

andkovacs_at_yahoo.com schreef:

> We are having some sort concurrency issue in our RAC environment using
> ASM.
> Database and ASM are running Oracle EE 10.2.0.2
>
> We have 3 LUNs set up on our CX500 for data.
> ASM is handling these LUNs for the RAC environment.
>
> When we read the LUNs on a single node the performance is around
> 90MB/s.
> When we read the same LUN (but different blocks) from a second node the
> performance drops down to 10MB/s.
> When we have two processes reading the same LUN from the same server
> the performance is around 130MB/s!

This raises lots of questions like

1) how is the hardware setup (platform, network + interconnects)
2) how did you test this ?
3) what type of file did you use to test ?
4) did you change the default templates ?
5) redundancy ?
6) lun layout ?

with kind regards,
Ronald.
http://ronr.blogspot.com/ Received on Tue May 09 2006 - 05:49:30 CDT