This read-write INTEGER controls how many of the most recent messages are retained and made available through SNMP, since the message table is limited to that many entries. An administrator raises this value if messages are being lost to truncation before they can be polled, or lowers it to reduce the agent's memory footprint. For example, increasing cnt2SmMsgTableSize after noticing gaps in the cnt2SmMsgIndex sequence ensures fewer older messages get dropped before a monitoring poll can capture them.