fddist

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



NAME
       fddist - file descriptor usage distributions. Uses DTrace.

SYNOPSIS
       fddist [-r|-w]

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 users with root privileges can run this
       command.

OPTIONS
       -r     reads only

       -w     writes only

EXAMPLES
       Sample both read and write activity,
              # fddist

       Sample reads only,
              # fddist -r

FIELDS
       EXEC   process name

       PID    process ID

       value  file descriptor

       count  number of events

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

DOCUMENTATION
       DTrace Guide "Aggregations" chapter (docs.sun.com)

       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
       fddist will sample until Ctrl-C is hit.

SEE ALSO
       dtrace(1M)




version 0.70                      June 8, 2005                        fddist(1m)