Php7, opcache and the need of clearing cache

I am running the last version of grav on an AWS host with Ubuntu xenial and php7. As recommended i installed php7.0-opcache and apcu. Apcu looks activated in the control "info" panel. When i create a new post or change the publishing date, the change does not show up until i manually clear the grav cache. How can i avoid this problem?

Oh btw, i am using php7-fpm as well.

what are you full cache: settings in system.yaml?

cache:
enabled: true
check:
method: file
driver: apcu
prefix: g
lifetime: 600
gzip: false