I installed Zimbra today. I want to replace another Unified Messaging System which runs under Windows with Zimbra.
I've got a host system with an Intel Core i7 920, 8GB RAM, 750GB HDD.
Because of I don't want to install it directly on this system I created a vServer with OpenVZ.
It can use 4 CPU Cores and I limited the RAM to 5GB.
I installed the Ubuntu Server 10.04 LTS AMD64 on this machine and downloaded and installed the open source version of Zimbra.
After the installation (i didn't installed all features, only them I need) there were only 1GB RAM free anymore.
I think it's a bit too much, because I use it for private use and only with about 3 users. (Some clients, many E-Mail accounts to manage, Calendar and Contacts so Zimbra would be perfect for this. No configuration on the client needed.)
Is there any way to decrease teh amount of used RAM?
Also another problem: I restarted the vServer and Zimbra doesn't start again.