iofileb.d(1m) USER COMMANDS iofileb.d(1m)NAMEiofileb.d - I/O bytes by file and process. Uses DTrace.
SYNOPSISiofileb.dDESCRIPTION
This prints a summary of requested disk activity by pathname, providing
totals of the I/O events in bytes. It is a companion to the iofile.d
script - which prints in terms of I/O wait time, not bytes. I/O wait
time is a better metric for understanding performance issues. Both
disk and NFS I/O are measured.
Since this uses DTrace, only users with root privileges can run this
command.
EXAMPLES
Sample until Ctrl-C is hit then print report,
# iofileb.dFIELDS
PID process ID
CMD process name
KB kilobytes of disk I/O
FILE file pathname
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs direc‐
tory. The DTraceToolkit docs may include full worked examples with ver‐
bose descriptions explaining the output.
EXITiofileb.d will sample until Ctrl-C is hit.
SEE ALSOiofile.d(1M), iosnoop(1M), dtrace(1M)version 1.00 Feb 20, 2006 iofileb.d(1m)