You can run Zammad on bare metal or on a virtual machine. Choose what you prefer.
For Zammad and a database server like PostgreSQL we recommend at least:¶
2 CPU cores
4 GB of RAM (+4 GB if you want to run Elasticsearch on the same server)
For optimal performance up to 40 agents:¶
4 CPU cores
6 GB of RAM (+6 GB if you want to run Elasticsearch on the same server)
Of course at the end it depends on actual load of concurrent agents and data traffic.
We can’t suggest any disk space recommendations, as this highly depends on how you work. Zammad will always try to recognize the same attachments and store it just once.
As the number of active users on your system grows, performance will eventually degrade, leading to:
delays for outgoing email,
long loading times when viewing or creating tickets,
stale or out-of-sync search results, or
stale or out-of-sync ticket overviews.
You may see modest improvements by
setting certain environment variables for Performance Tuning,