Limits the maximum size of the message log.
-iqmsgsz size
-iqmsgsz is an integer 0-2047 (inclusive), in MB. The default value is 0, which specifies that there is no limit on message log size. The IQMsgMaxSize server property corresponds to the -iqmsgsz server switch and takes precedence over the value of -iqmsgsz.
start_iq -n iqdemo iqdemo.db ... <other options> ... -iqmsgsz 100