rexkh

Can you consider to run multiple apache2 instances? Example, one instance for 500 vhost. It will reduce the time to restart significantly.

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?

That's a lot I guess. I think 5xx error cause by apache2 crash. What make it crash in the first place? Out of Memory issue?

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.

It happens everyday once if not a few. I'm curious why Apache always give 5xx error