How do I set value to KeepAliveTimeout on Apace Server 2.2 ?

[Datta]

Can anyone let me know where exactly and in which files do I have to
make the changes in order to set the following variables in Apache
server 2.2 ?
- KeepAlive
- KeepAliveTimeout
- MaxKeepAliveRequests
- MaxClients

I have read a lot about setting these values in httpd.conf on Apache
2.2 server at http://httpd.apache.org/docs/2.2/. However, after
hunting for these variables, I found them to be located in the
following files

- Apache2.2\manual\misc\perf-tuning.xml
- Apache2.2\manual\mod\core.xml
- Apache2.2\manual\vhosts\details.xml

Do I add statement “KeepAlive 8” in httpd.conf and if so, which .so
module do I have to uncomment to get the .xml files mentioned above
working ?