hotspot.d(1m) Mac OS X Manual Page

Mac Dev Center Mac OS X Reference Library General Mac OS X Man Pages

This manual page is for Mac OS X version 10.6.3

If you are running a different version of Mac OS X, view the documentation locally:

In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

For more information about the manual page format, see the manual page for manpages(5).
For more information about this technology, look for other documentation in the Apple Reference Library.
For general information about writing shell scripts, read Shell Scripting Primer.


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 users with root privileges 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)

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors: Report errors in the content of this documentation with the feedback links below.
Bug reports: Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems: Report formatting mistakes in the online version of these pages with the feedback links below.

Did this document help you?