Restart equal to Stop and then Start. During apache2 restart, server can not serve any web request so there is no load. No load means apache2 can start with full cpu power. Please correct me if I'm wrong.
I'm aware that Johnny restart apache2 every 2 hours to load new vhost so 24h it should do it 12 times but in incident report, down time is only around 5-6 times a day. It doesn't make sense to me. Do I miss some parts of the story?
I've played around with "systemctl restart apache2". For my experience, it shouldn't take more than a few seconds. It really take a few minutes to complete in Johnny and Tommy? I'm just curious.