[clue-tech] Tracking disk i/o by process?

[Kevin Fenzi]

On Mon, 3 Dec 2007 17:11:52 -0700
dan at drivefaster.net (Dan Harris) wrote:

> 
> On Dec 3, 2007, at 5:05 PM, Kevin Fenzi wrote:
> 
> > On Mon, 3 Dec 2007 17:01:23 -0700
> > dan at drivefaster.net (Dan Harris) wrote:
> >
> >> I'm troubleshooting a server that is suffering from some annoying
> >> i/o write storms and trying to track down which processes are to
> >> blame.
> >>
> >> Does anyone know of a way to track the number of read/writes and
> >> summarize them by pid?  dstat shows when it's happening, but
> >> doesn't show us *which* processes are responsible. which is not
> >> very helpful.
> >
> > Well, unfortunately it requires python-2.5, but if your machine has
> > that you can use iotop:
> >
> > http://guichaz.free.fr/misc/#iotop
> >
> >>
> 
> Thanks for the quick response.  This looks to be very useful,
> although it seems to want something I don't have..
> 
> "- Linux >= 2.6.20 with I/O accounting support: Not found"
> 
> This is kernel 2.6.22 using Ubuntu Gutsy server.  What do I need to  
> enable for "I/O accounting support"?
> 

Looks like its:

CONFIG_TASK_IO_ACCOUNTING

that needs to be set. It is set to 'y' here in my Fedora 8 kernel... 

kevin

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