fddist(1m) USER COMMANDS fddist(1m)

NAME
       fddist - file descriptor usage distributions. Uses DTrace.

SYNOPSIS
       ffddddiisstt [[-rr||-ww]]

DESCRIPTION
       This prints distributions for read and write events by file descriptor,
       by process. This can be used  to  determine  which  file  descriptor  a
       process is doing the most I/O with.

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

OOPPTTIIOONNSS
       -r     reads only

       -w     writes only


EEXXAAMMPPLLEESS
       Sample both read and write activity,
              # ffddddiisstt

       Sample reads only,
              # ffddddiisstt -r


FFIIEELLDDSS
       EXEC   process name

       PID    process ID

       value  file descriptor

       count  number of events


BBAASSEEDD OONN
       /usr/demo/dtrace/lquantize.d


DDOOCCUUMMEENNTTAATTIIOONN
       DTrace Guide "Aggregations" 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.

EEXXIITT
       fddist will sample until Ctrl-C is hit.

SEE ALSO
       dtrace(1M)




version 0.70                     Jun 08, 2005                       fddist(1m)