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diskhits(1)                     USER COMMANDS                    diskhits(1)




NAME

       diskhits - disk access by file offset. Uses DTrace.


SYNOPSIS

       diskhits pathname


DESCRIPTION

       This  prints  how  a file was accessed, the locations on a distribution
       plot.  This is for the cache misses  only  -  the  file  activity  that
       resulted in disk events.

       Since  this  uses  DTrace, only users with root privileges can run this
       command.


EXAMPLES

       Sample /var/adm/messages disk activity,
              # diskhits /var/adm/messages



FIELDS

       Location (KB)
              the file offset of the disk activity, Kbytes

       Size (KB)
              size of the disk activity, Kbytes

       Total RW
              Total disk activity, reads + writes



BASED ON

       /usr/demo/dtrace/applicat.d



DOCUMENTATION

       DTrace Guide "io Provider" chapter (docs.sun.com)

       See the DTraceToolkit for further documentation under the  Docs  direc-
       tory. The DTraceToolkit docs may include full worked examples with ver-
       bose descriptions explaining the output.


EXIT

       diskhits will sample until Ctrl-C is hit.


SEE ALSO

       dtrace(1M)



version 0.72                     Apr 20, 2006                     diskhits(1)

Mac OS X 10.6 - Generated Thu Sep 17 20:07:28 CDT 2009
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