Originally posted by: SystemAdmin

Hi all,
Im having some I/O bootleneck with my AIX system. I have a websphere with about 5 JVMs running inside of it.
Sometimes the applications are running slow and when I run iostat it shows usage of 100% for hdisk0 and 1.

My question is how can I show which process are consuming the I/O so I can find out which of the 5 JVM's (different PIDs) are doing that?

I have no filemon installed, is it possible to do that with native commands?
thanks!
Ricardo
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Originally posted by: alethad

You can look at topas for a simple overview of what is going on with your system. It's usually a quick way to determine generally where the problem lies.
Being that you say hdisk0 & hdisk1 are your culprits what disks do you have your paging space config'd to? If they are on hdisk0 & one which most people use then you may have a paging issue instead. Like not enough paging or the app is a memory hog or such.

You might look into filemon or nmon also if you need more details than what topas gives you.
Good luck.
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Originally posted by: SystemAdmin

thanks,

well, due to some polices I dont have topas, filemon, svmon....
So I was using vmstat and iostat and it is giving me more details about the problem.

By the vmstat pi and po values, Im pretty sure the problem is that server is swapping memory.
Im going to try to add more memory due to those data I got....
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Originally posted by: alethad

Did you set up enough paging? Double check that. From my little experience with Websphere it is a resource hog.

Sorry to hear about the policies thing. So you aren't able to install any of the perf filesets? If you had the basic perf filesets installed you would be able to use topas. Topas is only using the commands you're already using yourself. Nothing more. It's just putting it all together in a nice little window. It would be easy to prove that it's not doing anything you aren't doing manually.

Oh well, good luck. Hope you get it one day.
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Originally posted by: SystemAdmin

Ok alethad, thanks for your help.

And I agreed about topas, but even this command is not installed here.... Well, policies are policies...

thanks
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