As I already mentioned in the article Configuring Apache with PHP-FPM in CentOS/RHEL 7, PHP-FPM is a much more efficient to handle large volumes of queries. In this article we will see how to configure it in Ubuntu.
PHP-FPM, or PHP FastCGI Process Manager, is an alternative implementation of PHP FastCGI that can handle a high volume of queries. Combined with PHP 7, PHP-FPM achieves a higher level of performance than any previous version of PHP.