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



NAME
       weblatency.d - website latency statistics. Uses DTrace.

SYNOPSIS
       weblatency.d

DESCRIPTION
       This prints statistics for hostnames that browers have set GET requests for, in particular latency by
       hostname.

       The latency measured is from the browser sending the GET  request  to  when  the  browser  begins  to
       recieve the response. It is an overall response time for the client, and encompasses connection speed
       delays, DNS lookups, proxy delays, and web server response time.

       This is written as an experimental tool, and may not work at all with your browser.

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

EXAMPLES
       Print report after Ctrl-C is hit,
              # weblatency.d


FIELDS
       HOST   hostname from URL

       NUM    number of GETs

       AVGTIME(ms)
              Average time for response, ms

       MAXTIME(ms)
              Maximum time for response, ms


NOTES
       See  the  source  code  for the "BROWSER" variable, which sets the browser to trace (currently set to
       "mozilla-bin").


IDEA
       Bryan Cantrill (who wrote an elegant version for Sol 10 update 1)


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

AUTHOR
       Brendan Gregg [Sydney, Australia]

SEE ALSO
       dtrace(1M)




version 0.60                                    Nov 30, 2005                                weblatency.d(1m)