lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From edwardyf <edwar...@gmail.com>
Subject Re: Question bout I/O monitoring
Date Fri, 11 Sep 2009 05:24:22 GMT

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: java-dev-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-dev-help@lucene.apache.org
> 
> 
> 

-- 
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: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org


Mime
View raw message