This documentation is for Dovecot v2.x, see wiki1 for v1.x documentation.

Dovecot performance tuning

Disk I/O optimization

Usually heavily loaded IMAP and POP3 servers don't use much CPU, but they use all the disk I/O they can get. So reducing disk I/O is probably the most useful optimization you can do.

CPU usage optimization

Memory usage optimization

There aren't many settings which affect Dovecot's memory usage. About the only such settings are auth_cache_size and LoginProcess settings. In general Dovecot uses as much memory as it needs, which is usually quite little.

Note that these settings do not directly affect the memory usage:

PerformanceTuning (last edited 2015-07-24 12:36:21 by TimoSirainen)