finding bottlenecks on ubuntu systems - thanks !

[Mark van Harmelen]

Thanks Tim (off list) David and Joe

regards
mark




On Fri, Nov 13, 2009 at 7:14 PM, Joseph Salisbury <
josephtsalisbury at gmail.com> wrote:

> On Fri, Nov 13, 2009 at 2:12 PM, Joseph Salisbury
> <josephtsalisbury at gmail.com> wrote:
> > On Fri, Nov 13, 2009 at 9:14 AM, Mark van Harmelen
> > <markvanharmelen at gmail.com> wrote:
> >> Hi everyone
> >>
> >> I've never done this before so all hints would be gratefully received.
> >>
> >> We are running a 9.04 server, with a single unthreaded process that is
> of
> >> interest, basically one that is busy transforming the contents of a
> mysql
> >> db. I want to find out if we can improve the performance of this
> process.
> >>
> >> Seems potential limitations are
> >>
> >> - limited by CPU speed
> >> - limited by access to mysql data on disc
> >> - limited by memory size, and therefore spending its time paging
> >>
> >> I'm wondering if anyone has any great commands  and/or command options
> for
> >> me to start my investigations with, please.
> >
> > If you haven't already, install the sysstat package:
> >
> > sudo apt-get install sysstat
> >
> > This will give you some tools to gather performance statistics.  To
> > start you need to identify where the bottleneck is.  Use cpustat to
> > see if you are cpu bound, iostat to see if you are disk bound, vmstat
> > for pageing / memory stats, etc.
>
> Woops: s/cpustat/mpstat/g :-)
>
> >
> > For more detailed analysis, you can install and use profiling tools
> > such as oprofile or systemtap.
> >
> >>
> >> Or any strategies, words of advice, or (instructional) sources that you
> >> found useful in tuning your own systems.
> >
> > This can be an open ended question when it comes to performance
> > tuning.  The very simple answer is find your bottleneck and fix it.
> > There will always be a bottleneck and it will always move to another
> > resource once you fix it.  The goal is to have your cpu become the
> > bottleneck(Then continue to tune your application).
> >
> > It is best to try and tune your application first to use the available
> > resource most efficiently.  Don't just add more memory because your
> > swapping.  First identify why the process is consuming so much memory
> > in the first place.
> >
> > Hope this helps,
> >
> > Joe
> >
> >>
> >> thanks
> >> mark
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> ubuntu-server mailing list
> >> ubuntu-server at lists.ubuntu.com
> >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-server
> >> More info: https://wiki.ubuntu.com/ServerTeam
> >>
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-server/attachments/20091115/f2177b23/attachment.html>