Generate report of IO/datafile performance?

Hello,
I am working on some performance issues that we believe could be related to the IO subsystem. I am trying to find a way to get a baseline of the true IO performance of the database, looking only at datafile IO. In AWR reports, you can see various IO stats such as sequential read times, but this also takes memory reads into account which will skew the true IO performance numbers. Does anyone have experience with gauging IO performance in Oracle?
Thank you
Stack information
- 2 node rac cluster, 11.2.0.1 Oracle GI clusterware
- RDBMS: 11.2.0.1
- OS: IBM AIX 5l, 64 bit
- Storage: IBM GPFS, Shark

jhall wrote:
Hello,
I am working on some performance issues that we believe could be related to the IO subsystem. I am trying to find a way to get a baseline of the true IO performance of the database, looking only at datafile IO. In AWR reports, you can see various IO stats such as sequential read times, but this also takes memory reads into account which will skew the true IO performance numbers. Does anyone have experience with gauging IO performance in Oracle?
Thank you,
Javan Hall
Stack information
- 2 node rac cluster, 11.2.0.1 Oracle GI clusterware
- RDBMS: 11.2.0.1
- OS: IBM AIX 5l, 64 bit
- Storage: IBM GPFS, Shark
>Hello,
I am working on some performance issues that we believe could be related to the IO subsystem. I am trying to find a way to get a baseline of the true IO performance of the database, looking only at datafile IO. In AWR reports, you can see various IO stats such as sequential read times, but this also takes memory reads into account which will skew the true IO performance numbers. Does anyone have experience with gauging IO performance in Oracle?
Thank you,
Javan Hall
Stack information
- 2 node rac cluster, 11.2.0.1 Oracle GI clusterware
- RDBMS: 11.2.0.1
- OS: IBM AIX 5l, 64 bit
- Storage: IBM GPFS, Shark
http://www.oracle.com/technetwork/topics/index-089595.html

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