I compared two servers and see the Redis maxmemory is different. So, the answer is: YES
Opcache settings in php.ini is the same and the answer is: NO
8GB RAM > maxmemory: 1.6Gb redis-server
16GB Ram > maxmemory: 3.3Gb redis-server
For the PHP Opcache settings
I have multiple Wordpress websites on the server so should I increase the
@VirtuBox Please give a short hint if you have time.