Tunning Apache but setting not found

[niraj]

Hi

I have centos 7 and apache version is httpd-2.4.6 I want to tuning my apache for that I want to change the following parameters
But when I opened the httpd.conf not found any default configuration like below. Please guide where I found that Prefork.c settings in Centos 7

I have copied the below setting from the centos 6 system.

<IfModule prefork.c>
StartServers 16
MinSpareServers 10
MaxSpareServers 40
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
</IfModule>