[ale] Collectl and other peformance tools

[Jim Kinney]

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.

On Thu, Oct 7, 2010 at 8:49 PM, Brian Pitts <brian at polibyte.com> wrote:

> On 10/07/2010 05:44 PM, Brian Pitts wrote:
> > Atop will change your life.
> >
> > https://lwn.net/Articles/387202/
> >
>
> Sorry for the top post earlier, I'm not used to sending email from my
> phone. I wanted to take a minute to follow up and further tout the
> virtues of atop.
>
> When your performance monitoring system (be it collectd, xymon, opennms,
> or whatever) tells you there's a problem with a server, atop is what you
> want to use when you log in to find the problem. It has completely
> displaced my use of the sysstat suite of tools. It presents all the
> information you could get from sar and pidstat from within the friendly
> interface of top. You can view cpu, memory, i/o, and network statistics
> at the system and per-process level. You can do this in real time or you
> can step through samples recorded earlier. The next time a user
> complains about how things were "slow" the day before, you'll be able to
> go back and pinpoint exactly what was happening. Although the
> interactive interface is what really shines, if you still need sar style
> reports there's atopsar.
>
> The lwn article I linked to earlier is a great overview of what you can
> do with atop. For a more limited but in depth example of using atop this
> paper [0] is good. It's also worth reading because the beginning is a
> good refresher on virtual memory and the end presents a good use case
> for cgroups.
>
> [0] http://www.atoptool.nl/download/case_leakage.pdf
>
> --
> All the best,
> Brian Pitts
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-- 
-- 
James P. Kinney III
I would rather stumble along in freedom than walk effortlessly in chains.
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