diskhits - disk access by file offset. Uses DTrace. diskhits pathname This prints how a file was accessed, the locations on a distribution plot. This is for the cache misses only - the file activity that resulted in disk events. 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 /var/adm/messages disk activity, # diskhits /var/adm/messages

Location (KB) the file offset of the disk activity, Kbytes

Size (KB) size of the disk activity, Kbytes

Total RW Total disk activity, reads + writes

/usr/demo/dtrace/applicat.d

DTrace Guide "io Provider" chapter (docs.oracle.com) See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output. diskhits will sample until Ctrl-C is hit. dtrace(1M)