Apache Upgrade from 2.2.22 to 2.4.6

[rakesh kumar <rakesh.chndw@xxxxxxxxx>]

Hi,

I have upgraded apache server on Win2008 R2 server from 2.2.22 to 2.4.6.
After making all the required changes in the config file(as suggested here http://httpd.apache.org/docs/current/upgrading.html),I am able to start the Apache server.
Installed version is following:
Apache/2.4.6(win32) OpenSSL/0.9.8y

We are facing intermittent connectivity issues to all the sites . Access to the sites is slow .

There is no specific error we could find in the log.
However, there are large number of error logs being generated in the log directory.
types of file generated:
ssl_error-2013-11-28-20_18_31
<sid>_error-2013-11-28-20_18_31


Part of my httpd config file:

#Win32DisableAcceptEx

I have added the following 3 lines but not sure about if this can resolve the issue
#AcceptFilter http none
#EnableSendfile Off
#EnableMMAP off


Can you please help me figure out the fix?

Thanks in advance,
Rakesh