I am getting intermittent issues with my site. Pages often hang with huge loading times and sometimes fail to load.
The httpd error logs contain the following:
[Wed Feb 23 06:54:17 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 5871 for worker proxy:reverse
[Wed Feb 23 06:54:17 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 5871 for (*)
[Wed Feb 23 06:54:24 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 5872 for worker proxy:reverse
[Wed Feb 23 06:54:24 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized
[Wed Feb 23 06:54:24 2011] [debug] proxy_util.c(1967): proxy: initialized single connection worker 0 in child 5872 for (*)
[Wed Feb 23 06:59:15 2011] [debug] proxy_util.c(1854): proxy: grabbed scoreboard slot 0 in child 5954 for worker proxy:reverse
[Wed Feb 23 06:59:15 2011] [debug] proxy_util.c(1873): proxy: worker proxy:reverse already initialized
The server is currently running with 800mb free memory, so it is not caused by lack of RAM.
The current number of httpd procceses is 11. This does increase as the error persists and can rise up to 25+. Also, I am running Apache/2.2.3 (CentOS).
Any suggestions would be greatly appreciated.
Many thanks,
Chris.
EDIT
Access Log: http://pastebin.com/vRSwdhuP
httpd.conf: http://pastebin.com/effKp0ih
Please also note that this error only appears when the page is refreshed.
Best Answer
There is not enough information to give any informed guess but here are a few things you can look into or try:
ab -kc 10 -t 30 http://yourserver.com/somepage.php
If the pages load fast on the server then the issue is network related.[error]
header string. You can also check other error/system logs for relevant messages (/var/log/messages for example).