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hotspot.d(1m)                                   USER COMMANDS                                  hotspot.d(1m)



NAME
       hotspot.d - print disk event by location. Uses DTrace.

SYNOPSIS
       hotspot.d

DESCRIPTION
       hotspot.d  is  a  simple DTrace script to determine if disk activity is occuring in the one place - a
       "hotspot". This helps us understand the system's usage of a disk, it does not imply  that  the  exis-tance existance
       tance or not of a hotspot is good or bad (often may be good, less seeking).

       Since  this  uses  DTrace,  only the root user or users with the dtrace_kernel privilege can run this
       command.

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


FIELDS
       Disk   disk instance name

       Major  driver major number

       Minor  driver minor number

       value  location of disk event, megabytes

       count  number of events


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
       hotspot.d will sample until Ctrl-C is hit.

AUTHOR
       Brendan Gregg [Sydney, Australia]

SEE ALSO
       dtrace(1M)



version 0.95                                    May 14, 2005                                   hotspot.d(1m)