proxy - Apache httpd Problem

itemprop="text">

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.

itemprop="text">

class="normal">Answer

There is
not enough information to give any informed guess but here are a few things you can look
into or try:

• Try running
  ApacheBench on the server to see if the slow page loading issue
  can be duplicated. For example: ab -kc 10 -t 30
http://yourserver.com/somepage.php If the pages load fast on the server
  then the issue is network related.


• Try loading different
  types of pages (images, JS, CSS, PHP, HTML, SHTML, etc...) and see which ones load fast
  and which don't. If static files all load fast then the issue is something related to
  the dynamic page setup/execution. If all files load slow it is a more likely a general
  server/configuration issue.


• Do you have other Apache
  configuration files (check in '/etc/httpd/conf.d/' for example). Your virtual host
  entries reference proxy options but no ProxyPass or similar line is found. If you are
  proxying requests consider that the proxy source may be slow.
  Test it with
  ApacheBench to confirm.


• Those entries from your error log
  are not actual errors but just debug log statements. Errors will have a
  [error] header string. You can also check other error/system
  logs for relevant messages (/var/log/messages for
  example).