the per-process statistics of atop are exactly the detail level I'm looking for. Many thanks! It's not a default installed package with RHEL/Fedora but it's in the repos.<br><br><div class="gmail_quote">On Thu, Oct 7, 2010 at 8:49 PM, Brian Pitts <span dir="ltr"><<a href="mailto:brian@polibyte.com">brian@polibyte.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On 10/07/2010 05:44 PM, Brian Pitts wrote:<br>
> Atop will change your life.<br>
><br>
> <a href="https://lwn.net/Articles/387202/" target="_blank">https://lwn.net/Articles/387202/</a><br>
><br>
<br>
</div>Sorry for the top post earlier, I'm not used to sending email from my<br>
phone. I wanted to take a minute to follow up and further tout the<br>
virtues of atop.<br>
<br>
When your performance monitoring system (be it collectd, xymon, opennms,<br>
or whatever) tells you there's a problem with a server, atop is what you<br>
want to use when you log in to find the problem. It has completely<br>
displaced my use of the sysstat suite of tools. It presents all the<br>
information you could get from sar and pidstat from within the friendly<br>
interface of top. You can view cpu, memory, i/o, and network statistics<br>
at the system and per-process level. You can do this in real time or you<br>
can step through samples recorded earlier. The next time a user<br>
complains about how things were "slow" the day before, you'll be able to<br>
go back and pinpoint exactly what was happening. Although the<br>
interactive interface is what really shines, if you still need sar style<br>
reports there's atopsar.<br>
<br>
The lwn article I linked to earlier is a great overview of what you can<br>
do with atop. For a more limited but in depth example of using atop this<br>
paper [0] is good. It's also worth reading because the beginning is a<br>
good refresher on virtual memory and the end presents a good use case<br>
for cgroups.<br>
<br>
[0] <a href="http://www.atoptool.nl/download/case_leakage.pdf" target="_blank">http://www.atoptool.nl/download/case_leakage.pdf</a><br>
<br>
--<br>
All the best,<br>
<font color="#888888">Brian Pitts<br>
</font><div><div></div><div class="h5">_______________________________________________<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>-- <br>James P. Kinney III<br>I would rather stumble along in freedom than walk effortlessly in chains.<br><br><br>