.TH vmstat.d 1m "Jun 11, 2005" "version 0.80" "USER COMMANDS" .SH NAME vmstat.d \- vmstat demo in DTrace. Uses DTrace. .SH SYNOPSIS .B vmstat.d .SH DESCRIPTION This has been written to demonstrate fetching the same data as vmstat from DTrace. This program is intended as a starting point for other DTrace scripts, by beginning with familiar statistics. Since this uses DTrace, only the root user or users with the dtrace_kernel privilege can run this command. .SH EXAMPLES .TP Print virtual memory statistics every second, # .B vmstat.d .PP .SH FIELDS .TP w swapped out light weight processes .TP swap virtual memory free, Kbytes .TP free free RAM, Kbytes .TP re page reclaims, Kbytes .TP mf minor faults, Kbytes .TP pi page ins, Kbytes .TP po page outs, Kbytes .TP fr pages freed, Kbytes .TP sr scan rate, pages .TP in interrupts, number .TP sy system calls, number .TP cs context switches, number .PP .SH NOTES Most of the statistics are in units of kilobytes, unlike the original vmstat command which sometimes uses page counts. As this program does not use Kstat, there is no summary since boot line. Free RAM is both free free + cache free. .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 vmstat.d will run until Ctrl\-C is hit. .SH AUTHOR Brendan Gregg [Sydney, Australia] .SH SEE ALSO vmstat(1M), dtrace(1M)