iofileb.d - I/O bytes by file and process. Uses DTrace. iofileb.d 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 the root user or users with the dtrace_kernel privilege can run this command. Solaris stable - needs the io provider.

Sample until Ctrl-C is hit then print report, # iofileb.d

PID process ID

CMD process name

KB kilobytes of disk I/O

FILE file pathname

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