Resource Limitation in OSPF

Limit maximum number of LSAs in the database:
R1(config-router)#max-lsa <1-4294967294>

Limit maximum number of redistributed routes:
R1(config-router)#redistribute maximum-prefix <1-4294967294>

To specify the minimum percentage of CPU process time OSPF takes before the CPU should yield to a process with a higher priority:
R1(config-router)#process-min-time percent <1-100>

http://www.cisco.com/en/US/docs/ios/iproute_ospf/command/reference/iro_osp2.html