向高人请教Parent Server Generation过大的问题!!

server-status查看服务器状态,Parent Server Generation在５小时内有12次．．．非常的郁闷．．不知道是怎么回事．．


Current Time: 星期四, 24-五月-2007 09:03:08 中国标准时间
Restart Time: 星期四, 24-五月-2007 03:11:03 中国标准时间
Parent Server Generation: 12
Server uptime: 5 hours 52 minutes 5 seconds
Total accesses: 107478 - Total Traffic: 2.1 GB
5.09 requests/sec - 103.4 kB/second - 20.3 kB/request
20 requests currently being processed, 480 idle workers

apache2.22在win2000下使用的配置．
<IfModule mpm_winnt.c>
#ThreadsPerChild 250
#MaxRequestsPerChild  0
#ThreadLimit 20000
ThreadsPerChild 500
#MaxRequestsPerChild  1000
Win32DisableAcceptEx
</IfModule>