I want to compile the latest apache 2.0.48, and I need to be able to use MaxClient 512.
I heard that I should change something in the source code for this.

Anyone can point me the correct way ?

I read in the apache installation doc, but cant find it.

Thanks.

you shouldn't need to recompile apache to change this value. Look in httpd.conf for Maxclients and change it, then restart the service (service httpd stop ; service httpd start).

For cpanel servers, httpd.conf can be found @ /usr/local/apache/conf/httpd.conf , for others, it depends, but usually somewhere like /etc/httpd/conf/httpd.conf I believe.

In version 1.3.x you need to edit /src/include/httpd.h and change HARD_SERVER_LIMIT. AFAIK, this does not carry over to version 2.x, so you should only have to raise MaxClients.