You can also integrate the results from iostat on an otherwise idle machine.
On Thu, Sep 10, 2009 at 10:24 PM, edwardyf <[email protected]> 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 > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > > > -- > View this message in context: > http://www.nabble.com/Question-bout-I-O-monitoring-tp25394566p25395172.html > Sent from the Lucene - Java Developer mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- Ted Dunning, CTO DeepDyve
