.TH fddist 1m  "$Date:: 2007-08-05 #$" "USER COMMANDS"
.SH NAME
fddist \- file descriptor usage distributions. Uses DTrace.
.SH SYNOPSIS
.B fddist [\-r|\-w]
.SH 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.
.SH OS
Solaris
.SH STABILITY
stable - needs the syscall provider.
.SH OPTIONS
.TP
\-r
reads only
.TP
\-w
writes only
.PP
.SH EXAMPLES
.TP
Sample both read and write activity,
# 
.B fddist
.TP
Sample reads only,
#
.B fddist
\-r
.PP
.SH FIELDS
.TP
EXEC
process name
.TP
PID
process ID
.TP
value
file descriptor
.TP
count
number of events
.PP
.SH BASED ON
/usr/demo/dtrace/lquantize.d
.PP
.SH 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.
.SH EXIT
fddist will sample until Ctrl\-C is hit. 
.SH SEE ALSO
dtrace(1M)