fddist 1m "$Date: 2015/09/30 22:01:09 $" "USER COMMANDS"
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 the root user or users with the
dtrace_kernel privilege can run this command.
OS
Solaris
STABILITY
stable - needs the syscall provider.
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)
Indexes created Wed Apr 29 00:23:26 UTC 2026