vopstat - vnode interface statistics. Uses DTrace. vopstat [-t] [/mountname] 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. Solaris 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.

-t trace activity as it occurs

/mountname examine this FS only

default output, summary each 5 secs, # vopstat

only examine /var, # vopstat /var

trace activity to /var, # vopstat -t /var

Count number of calls

mSeconds total of elapsed times

Event vop call name

Device device instance name

Path full pathname to file

RW Read or Write

Size size in bytes, if available

Offset offset in bytes, if available

See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output. vopstat will sample until Ctrl-C is hit. Richard McDougall dtrace(1M)