“It is critical to use a PHP cache for high performance. Fortunately, PHP5 and newer versions such as PHP 7 come with this PHP cache included by default.”
How can I verify that I’m using a PHP cache? I’m using Piwik with nginx and php-fpm.
I’ve set opcache.enable=1 in fpm-php5.6/php.ini. Should that satisfy the critical need for a php cache for Piwik?
From what the OPCache web site says - yes. You could try using APC (This is what I use with four clustered servers) but OPCache is built in.