I just spent weeks finding and understanding the OID's needed for monitoring memory and processor utilization on a Cisco 6509 with SUP2, MSFC and PFC (Policy Feature Cards).
Here are the OID's for anyone who may be interested.
Memory Utilization OID's for Cisco 6509
SUP2 Processor Memory Free: 1.3.6.1.4.1.9.9.221.1.1.1.1.8.4001.1 SUP2 Processor Memory Used:1.3.6.1.4.1.9.9.221.1.1.1.1.7.4001.1
SUP2 IO Memory Free: 1.3.6.1.4.1.9.9.221.1.1.1.1.8.4001.2 SUP2 IO Memory Used:1.3.6.1.4.1.9.9.221.1.1.1.1.7.4001.2
MSFC Processor Memory Free: 1.3.6.1.4.1.9.9.221.1.1.1.1.8.4011.1 MSFC Processor Memory Used: 1.3.6.1.4.1.9.9.221.1.1.1.1.7.4011.1
MSFC IO Memory Free: 1.3.6.1.4.1.9.9.221.1.1.1.1.8.4011.2 MSFC IO Memory Used: 1.3.6.1.4.1.9.9.221.1.1.1.1.7.4011.2
CPU Utilization OID's for Cisco 6509
MSFC Processor Usage in %: .1.3.6.1.4.1.9.9.109.1.1.1.1.5.1 SUP2 Processor Usage in %: .1.3.6.1.4.1.9.9.109.1.1.1.1.5.2 PFC Processor Usage in %: .1.3.6.1.4.1.9.9.109.1.1.1.1.5.3
I hope this saves someone some time.