After activation plugin 3-5 minuts works good, but after crash DB connection and use 100% Memory.
Used WP Super Cache plugin and try different configuration API, FastAjax, Javascript – all configuration have similar effect, 100% memory usage and lost DB conection. Helps only restore from Backup.
Wordpress 5.3.2
MySQL 5.7.29
CentOS
Total CPUs : 4 / 4 Cores
Total RAM : 4 GB
More than 30K Posts and more than 100K dayly pageviews