httpd-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "pradeep kumar" <pradeep.sm...@gmail.com>
Subject High CPU utilization on using Apache as a reverse proxy
Date Mon, 14 Aug 2006 14:47:44 GMT
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/%3C200510252354.30673.jsnow27@gatesec.net%3E.


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

Mime
View raw message