The author of this installation guide installs 3 caching programs on a ISPConfig 3 server. Is it necessary? After all, all the 3 relevant programs are for PHP as well. https://www.howtoforge.com/perfect-...2-php-mysql-pureftpd-bind-dovecot-ispconfig-3
May you please tell me which these 3 programs are? As far as I see the tutorial installs 1 caching program and that's xcache.
Here they are: php5-memcache php5-memcached memcached https://www.howtoforge.com/perfect-...hp-mysql-pureftpd-bind-dovecot-ispconfig-3-p4
php5-maccache is the php driver fro memcache, its not a php cache. Same applies to php5-memcached and memcached is a fast in memory key/value store, it is not a PHP cache.