With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cermResOwnerResGroupCount
Cisco Embedded Resource Manager Resource Owner Resource Group Count
1.3.6.1.4.1.9.9.510.1.2.1.1.7
This object indicates the number of resource groups which consume resources from the resource owner.
Back to CISCO-ERM-MIB MIB page.
IPHost Network monitor allows you to monitor cermResOwnerResGroupCount 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.