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iofile.d(1m)                                    USER COMMANDS                                   iofile.d(1m)



NAME
       iofile.d - I/O wait time by file and process. Uses DTrace.

SYNOPSIS
       iofile.d

DESCRIPTION
       This  prints  the  total I/O wait times for each filename by process.  This can help determine why an
       application is performing poorly by identifying which file they are waiting on, and the total  times.
       Both disk and NFS I/O are measured.

       Since  this  uses  DTrace,  only the root user or users with the dtrace_kernel privilege can run this
       command.

EXAMPLES
       Sample until Ctrl-C is hit then print report,
              # iofile.d


FIELDS
       PID    process ID

       CMD    process name

       TIME   total wait time for disk events, us

       FILE   file pathname


BASED ON
       /usr/demo/dtrace/iocpu.d


DOCUMENTATION
       See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs  may
       include full worked examples with verbose descriptions explaining the output.

EXIT
       iofile.d will sample until Ctrl-C is hit.

SEE ALSO
       iosnoop(1M), dtrace(1M)




version 0.70                                    Jul 24, 2005                                    iofile.d(1m)