/usr/sbin/dtrace -q -Z -32 -n '
/*
# Program: Requests by httpd process <viewreqsbyproc.d>
#
# Author: Matty <matty91 at gmail dot com>
#
# Current Version: 0.1a
#
# Revision History:
#  Version 0.1a
#
# Last Updated: 11-25-2005
#
# Purpose: Prints the number of requests processed by each httpd process
#
# Installation:
#   Copy the shell script to a suitable location
#
# CDDL HEADER START
#  The contents of this file are subject to the terms of the
#  Common Development and Distribution License, Version 1.0 only
#  (the "License").  You may not use this file except in compliance
#  with the License.
#
#  You can obtain a copy of the license at Docs/cddl1.txt
#  or http://www.opensolaris.org/os/licensing.
#  See the License for the specific language governing permissions
#  and limitations under the License.
# CDDL HEADER END
#
# Example:
#  $ viewreqsbyproc.d
#  Execname  Process  Requests Processed
#   httpd    19103       16
#   httpd    19152       17
#   httpd    19101       17
#   httpd    19102       19
#   httpd    19104       20
#   httpd    19105       20
#
#
*/

dtrace:::BEGIN
{
    printf("Sampling request data (Ctrl-C to stop and print):\n");
}

::apache_log_request:log-request
{
   @requests[execname,pid] = count();
}

dtrace:::END
{
    printf("Execname  Process  Requests Processed\n");
    printa("%-8s  %-7d  %-@7d\n",@requests);
    trunc(@requests);
}'