With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpmCPUMemoryLowest
Cisco Process Monitor CPU Memory Lowest
1.3.6.1.4.1.9.9.109.1.1.1.1.15
The lowest free memory that has been recorded since device has booted.
Back to CISCO-PROCESS-MIB MIB page.
IPHost Network monitor allows you to monitor cpmCPUMemoryLowest on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.
