iofileb
iofileb.d(1m) USER COMMANDS iofileb.d(1m)
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)
version 1.00 February 20, 2006 iofileb.d(1m)