On Fri, 2007-08-17 at 20:29 -0400, Mag Gam wrote:
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 <snip sig stuff>
I *think* that sar (System Activity Reporting?) package is still available? Haven't looked/used for a long time. If so, you should be able to get what you want, and a lot more, by installing and activating it.
HTH -- Bill