Random Thoughs by Paul

In Zimbra 5 the RAM settings seem to be very aggressive, aimed at servers with lots of memory. If you are trying to deploy Zimbra on a smaller server you may want/need to tune those down. I don't suggest anything under 2GB of RAM for Zimbra of any size... That said you can view the two main memory settings you'll be tweaking by running the following commands as the zimbra user:

# zmlocalconfig mailboxd_java_heap_memory_percent
# zmlocalconfig mysql_memory_percent

I moved a great deal of my mail over to Zimbra 5.0 this weekend and the migration went great until I got to one domain where the users had quite a few large attachments. I had neglected to increase the allowable attachment size in Zimbra causing many of the message imports to fail. To up the limit run the following commands as root:

su - zimbra
zmprov mcf zimbraMtaMaxMessageSize 50000000
zmprov mcf zimbraFileUploadMaxSize 50000000