Looking for Apache Global Configuration and PHP-FPM Pool Options Suggestions

The most ideal Apache Global Configuration and What should be the PHP-FPM Pool Options? Only one website is hosted on the Dedicated server. A very high website traffic. The average number of page views per day is 250,000. 1. Apache Server MPM: How should the best configuration of prefork Global Configuration be? 2. In the PHP-FPM Pool Options; What should be the values of Max Children? Process Idle Timeout? and Max Requests? Frequent error message from server: User:.... PID:19316 PPID:2073 Run Time:81(secs) Memory:674236(kb) RSS:46036(kb) exe:/opt/cpanel/ea-php70/root/usr/sbin/php-fpm cmd:php-fpm: pool ... ------------- Dedicated Server Features: Dell R220 4x 3.50 GHz Intel" Xeon" E3-1241 v3 (1 Soket) 16 GB RAM 2 x 600 GB SAS Total processors: 8 ------ The latest Settings are: Apache Server MPM: prefork Global Configuration The following settings have been saved: keepalive: On keepalivetimeout: 5 serverlimit: 5000 maxclients: 5000 maxrequestsperchild: 2500 maxkeepaliverequests: 150 startservers: 25 minspareservers: 25 maxspareservers: 50 timeout: 150 ---- PHP-FPM Pool Options: System PHP-FPM Status: On Max Children: 150 Process Idle Timeout: 10 Max Requests: 5000