Hi,
I notice there is a 100% CPU utilization which spikes for sometime and then goes back to normalcy when Apache is used a reverse proxy. I noticed a mail thread which seems to be a similar problem
http://mail-archives.apache.org/mod_mbox/httpd-dev/200510.mbox/[EMAIL PROTECTED].
One thread of one of the child processes hangs, calling poll() and writev() system calls so frequently that it causes 100% CPU util. The thread is trying to writev() to a socked which is in CLOSE_WAIT The child process ends after time defined by ndd parameter tcp_keepalive_interval and the same service time can be seen in access_log. The problem disappears then.
Regards,
Pradeep
