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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: Question bout I/O monitoring
Date Fri, 11 Sep 2009 06:50:52 GMT
You can also integrate the results from iostat on an otherwise idle machine.

On Thu, Sep 10, 2009 at 10:24 PM, edwardyf <edwardyf@gmail.com> wrote:

>
> unfortunately i am running a Red hat enterprise version, i am doing an
> academic experiment which need number of disk I/Os.
>
> I am now looking at SystemTap, which is said to be the iosnoop for linux.
> thanks for the guide
>
>
>
> Brian Pinkerton-2 wrote:
> >
> > If you're on a Mac or Solaris, dtrace will tell you everything you
> > want to know (and more.)  If you're not familiar with dtrace,
> > iosnoop.d is a good start for this kind of measurement.
> >
> > At Technorati, I used dtrace to build a trace file of all the read
> > requests made by a big lucene app, recording timestamp, file, offset,
> > and number of bytes read.  Among other things, the measurement led me
> > to decrease the heap size of the JVM so that more of the index would
> > fit in the file cache.
> >
> > bri
> >
> > On Sep 10, 2009, at 9:39 PM, edwardyf wrote:
> >
> >>
> >> Thanks for the reply, just checked the Lucid Gaze package, it only
> >> collects
> >> the stats at
> >> function call level, no I/O stats
> >
> >
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> >
> >
>
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>
>
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>


-- 
Ted Dunning, CTO
DeepDyve

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