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Diffstat (limited to 'Man/man1m/bitesize.d.1m')
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diff --git a/Man/man1m/bitesize.d.1m b/Man/man1m/bitesize.d.1m new file mode 100644 index 000000000000..4ef13bec7d8c --- /dev/null +++ b/Man/man1m/bitesize.d.1m @@ -0,0 +1,57 @@ +.TH bitesize.d 1m "$Date:: 2007-08-05 #$" "USER COMMANDS" +.SH NAME +bitesize.d \- analyse disk I/O size by process. Uses DTrace. +.SH SYNOPSIS +.B bitesize.d +.SH DESCRIPTION +This produces a report for the size of disk events caused by +processes. These are the disk events sent by the block I/O driver. + +If applications must use the disks, we generally prefer they do so +sequentially with large I/O sizes, or larger "bites". + +Since this uses DTrace, only the root user or users with the +dtrace_kernel privilege can run this command. +.SH OS +Solaris +.SH STABILITY +stable - needs the io provider. +.SH EXAMPLES +.TP +Sample until Ctrl\-C is hit then print report, +# +.B bitesize.d +.PP +.SH FIELDS +.TP +PID +process ID +.TP +CMD +command and argument list +.TP +value +size in bytes +.TP +count +number of I/O operations +.PP +.SH NOTES +The application may be requesting smaller sized operations, which +are being rounded up to the nearest sector size or UFS block size. + +To analyse what the application is requesting, DTraceToolkit programs +such as Proc/fddist may help. +.PP +.SH 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. +.SH EXIT +bitesize.d will sample until Ctrl\-C is hit. +.SH AUTHOR +Brendan Gregg +[Sydney, Australia] +.SH SEE ALSO +iosnoop(1M), seeksize(1M), dtrace(1M) + |