I've installed Zimbra 6 Beta 2 on CentOS5.3 (64Bit) and also Ubuntu Server 8.04 LTS (64Bit). On both linux distributions zimbra needs more than 10 minutes to start on an Athlon X2 5050e based test system with 4 Gigabyte RAM. CentOs and Ubuntu are running in a VirtualMachine (using VirtualBox 2.2.4)
Is this a normal startup time or Zimbra?
Also some Java processes produces high cpu usage (80-100%) on theses servers, even if you don't work with Zimbra. Is this a problem with Virtualbox, or a normal behavior?