This is a relatively high-volume environment, with 4 servers running with mirrormode to enable multi-master replication. The current database size is about 900mb. Is there any setting that could limit this memory usage? I don't feel this is "normal" considering our DB size and cache sizes.Very likely ITS#6660, you need to update to 2.4.24.
Also make sure you use an alternative memory allocator if you are running on Linux, such as tcmalloc from the google perf tools package, or hoard.
--Quanah -- Quanah Gibson-Mount Sr. Member of Technical Staff Zimbra, Inc A Division of VMware, Inc. -------------------- Zimbra :: the leader in open source messaging and collaboration