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+.TH vopstat 1m  "$Date:: 2007-08-05 #$" "USER COMMANDS"
+.SH NAME
+vopstat \- vnode interface statistics. Uses DTrace.
+.SH SYNOPSIS
+.B vopstat [\-t] [/mountname]
+.SH DESCRIPTION
+This will either produce summary reports of vnode statistics, or
+trace activity.
+
+Since this uses DTrace, only the root user or users with the
+dtrace_kernel privilege can run this command.
+.SH OS
+Solaris
+.SH STABILITY
+unstable - this script uses fbt provider probes which may change for
+future updates of the OS, invalidating this script. Please read
+Docs/Notes/ALLfbt_notes.txt for further details about these fbt scripts.
+.SH OPTIONS
+.TP
+\-t
+trace activity as it occurs
+.TP
+/mountname
+examine this FS only
+.PP
+.SH EXAMPLES
+.TP
+default output, summary each 5 secs,
+# 
+.B vopstat
+.TP
+only examine /var,
+#
+.B vopstat
+/var
+.TP
+trace activity to /var,
+#
+.B vopstat
+\-t /var
+.PP
+.SH FIELDS
+.TP
+Count
+number of calls
+.TP
+mSeconds
+total of elapsed times
+.TP
+Event
+vop call name
+.TP
+Device
+device instance name
+.TP
+Path
+full pathname to file
+.TP
+RW
+Read or Write
+.TP
+Size
+size in bytes, if available
+.TP
+Offset
+offset in bytes, if available
+.PP
+.SH DOCUMENTATION
+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
+vopstat will sample until Ctrl\-C is hit. 
+.SH AUTHOR
+Richard McDougall
+.SH SEE ALSO
+dtrace(1M)