Re: AIX 5.2 debug software recomondataion

From: Nicholas Dronen (ndronen_at_io.frii.com)
Date: 04/30/03 

Date: 30 Apr 2003 01:33:27 GMT

Steve Dryden <dryden.dcsi@mindspring.com> wrote:
SD> Can anyone recommend a performance monitoring software tool for
SD> AIX5.2? We have a process looping consuming the CPU(100%) and the
SD> only resolution our SYS Admin&#8217;s have is to push the On/Off
SD> button. We need to know what is looping and shutting the machine down
SD> does not collect enough data to resolve the problem.
SD> Suggestions.

You don't need anything beyond ps(1) to get enough data to know
*which* process is using the most processor time.

The process with the highest value in the C column is the one using
the processor most agressively at the moment in the output of this
command pipeline.

$ ps -ef | head -1; ps -ef | sed 1d | sort +4 -nr | head -10

There are tools, like truss, that'll help you see what the process
is doing, but I don't think that information would be useful to you.

Other tools -- like nmon, which you can find in a Google search for
'nmon AIX' -- provide lots of information, but I think what's called
for here is simplicity and clarity, not a tool that seems useful
because it provides a lot of fancy data.

Regards,

Nicholas 

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