Even with zmlogger disabled, Zimbra 6.0 and 6.0.1 are way slower than 5.0.x ever was.
I'm running a small installation, about 6 concurrent users and 10Gig worth of mail. Scanning the INBOX with an IMAP client has become much, much slower that it was in 5.0.x. At the same time, memory utilization has gone up. 5.0.x used to run happily with 1G physical RAM, 6.0 seems to require at least 2G in our setup. The jetty java process alone takes 800MB.
This all seems a bit excessive for a total of 10 mailboxes.
Has anybody seen something similar?