Hi, I am hosting 5 Wordpress multisites with 500 to 700 sites each. And I need to put a Let's Encrypt certificate on each site. So far, I made the following decisions : - Each multisite is a Website. - Then, Let's Encrypt forces me to use "Aliasdomain (vhost)" for each site, because if I use normal Aliasdomains every domains will be put in one big certificate. I would be very limited in the number of aliases for each site. - PHP-FPM is unthinkable, because ISPConfig would create one pool per Alias, so I am using FastCGI. ISPConfig is having a hard time managing so many vhosts. So far, I made a cron to unmount the logs, because the system was not working properly with thousands of bind mounts. I also have problems with the restart of Apache, which can take 30s to parse all the vhosts. But globally, it is stable. One huge problem I have, is that every Aliasdomain runs it's own fastcgi process. It is not a problem when the server is idle, but sometimes I see bots that opens hundreds of differents sites in a few minutes. When it happens, hundreds of processes are launched and it ends in huge load, freezing the server, and sometimes OOMs. So my question is, how would you manage huge multisites with ISPConfig? Thank you.