Thanks John.
Yes, this is a tricky question, but I face this a lot....Unfortunately, I am not sure how to check the adapter throughput, and what process is causing the i/o wait.
On 8/17/07, John R Pierce pierce@hogranch.com wrote:
Mag Gam wrote:
Hello:
I have a server with 2 HBAs, and the users keeps complaining about performance problems. My question is, how can I relate the process with high I/O wait? Also, is it possible to see how much data is being pushed thru by my 2 HBAs?
iostat (part of the sysstat package) will answer your 2nd question.
I dunno how to measure io wait time per process. maybe IBM's NMON can do that, not sure, I haven't used it for a while. http://www-941.haw.ibm.com/collaboration/wiki/display/WikiPtype/nmon
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