With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cfmAlarmHistorySize
Cisco Flow Monitor Alarm History Size
1.3.6.1.4.1.9.9.692.1.6.1
This object specifies the maximum number of rows the cfmAlarmHistoryTable can contain at any given time. If the device raises or clears an alarm and the cfmAlarmHistoryTable already contains a number of rows equal to the value of this object, then it destroys the oldest row before creating a new one.
Back to CISCO-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cfmAlarmHistorySize on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.