Nextcloud configuration

Nextcloud configuration issues on Debian 9 Stretch

In an attempt to get email and storage fixed, I am trying to get dovecot, postfix and nextcloud to integrate. With varying levels of success - what else is new?
Anyway, nextcloud greets with the fact I do not have OPcache enabled, and I should add to php.ini.

WRONG

NOT php.ini

So, I did... I added

opcache.enable=1 opcache.enable_cli=1 opcache.interned_strings_buffer=8 opcache.max_accelerated_files=10000 opcache.memory_consumption=128 opcache.save_comments=1 opcache.revalidate_freq=2

to every php.ini I could find.

The /etc/php/7.0/apache2/php.ini seems most logical, and is even mentioned in nextcloud channels. To no avail...
Tried /etc/php/7.0/cli/php.ini, which seems unlogical, but I don't know how nextcloud processes php.
That didn't help, either!

but opcache.ini

In fact, find opcache.ini, and edit it. Add above code, or lower buffers, files and memory to half the values, of what you can afford; proportionally.

service apache2 reload

As a result, your nextcloud will no longer nag you with caching stuff (apart from memcache, that is - do I need Redis?!?)