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excessive IOWAIT

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giantpanda77

giantpanda77

Technical User
Oct 28, 2004
4
CA
i have a server constantly have high iowait, but i am not able to tell which process generate the most of io. none commands, such as iostat, sar, top will give me this kind of information.

hope there is some command can help me to spot the process generate the most of io


let to know input from all guru here. thanks
 
If you are swapping or paging heavily, it might just be that.


"lsof" (Skunkware) can tell you what processes are accessing specific files.

Also, a process waiting for I/O would have something in WCHAN, wouldn't it?

Tony Lawrence
Linux/Unix/Mac OS X Resources
 
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