fddist(1m) USER COMMANDS fddist(1m)
fddist - file descriptor usage distributions. Uses DTrace.
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
-r reads only
-w writes only
Sample both read and write activity,
Sample reads only,
# fddist -r
EXEC process name
PID process ID
value file descriptor
count number of events
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.
fddist will sample until Ctrl-C is hit.
version 0.70 June 8, 2005 fddist(1m)