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hotspot.d(1m) [osx man page]

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 existance 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 ver- bose 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)

Check Out this Related Man Page

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

NAME
syscallbysysc.d - syscalls by syscall. Uses DTrace. SYNOPSIS
syscallbysysc.d DESCRIPTION
syscallbysysc.d is a DTrace OneLiner to a report of the number of each type of system call made. This is useful to identify which system call is the most common. Docs/oneliners.txt and Docs/Examples/oneliners_examples.txt in the DTraceToolkit contain this as a oneliner that can be cut-n-paste to run. Since this uses DTrace, only users with root privileges can run this command. EXAMPLES
This samples until Ctrl-C is hit. # syscallbysysc.d FIELDS
first field This is the system call type. Most have man pages in section 2. second field This is the count, the number of occurrances for this system call. DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver- bose descriptions explaining the output. EXIT
syscallbysysc.d will sample until Ctrl-C is hit. AUTHOR
Brendan Gregg [Sydney, Australia] SEE ALSO
procsystime(1M), dtrace(1M), truss(1) version 1.00 May 15, 2005 syscallbysysc.d(1m)
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