NAME
iofileb.d - I/O bytes by file and process. Uses DTrace.
SYNOPSIS
iofileb.d
DESCRIPTION
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.d
FIELDS
- 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 directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output.
EXIT
iofileb.d will sample until Ctrl-C is hit.
SEE ALSO
iofile.d(1M), iosnoop(1M), dtrace(1M)