We use the latest version of zammad (2.4). Actually we are 15 agents with about 800 tickets. When we open a ticket we have to wait about 3 seconds to see it. The same if we want to edit an user or organisation. Our server is an VM with SSD Storage behind. It runs the lates ubuntu 16.04 LTS with 4 CPU and 8 GB of RAM as described in your documentation. The only thing we changed is, that we used apache2 as webserver not nginx.
Is there any change to optimzie the installation. In the near feature we want to roll it out, than we have about 100 agents, but with this performance … we can’t.
We also run elasticsearch on the same machine. The database ist postgres 9.5