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Enable Netflow functionality on a Router Vs CPU Performance

Hi Gurus of Cisco.

I am in a project to monitor some KPI on my some routers, We have a SNMP tool, and recently we bought a features of Netflow to integrate to this managment.

Ours routers in average has peaks of 40% of consume of CPU

If for example I enable this functionality

router#enable

Password:*****

router#configure terminal

router(config)#interface FastEthernet 0/1

router(config-if)#ip route-cache flow

router(config-if)#exit

router(config)#ip flow-export destination 192.168.9.101 9996

router(config)#ip flow-export source FastEthernet 0/1

router(config)#ip flow-export version 9

router(config)#ip flow-cache timeout active 1

router(config)#ip flow-cache timeout inactive 15

router(config)#snmp-server ifindex persist

router(config)#^Z

router#write

enable on both interface (FastEthernet 0/0 and FastEthernet 0/1)

My doubt is, The CPU processing would be grow?. Enable this feature will be damage the performance of the Routers (CPU, Memory, more traffic on his interface).

Please, let me know.

I hope your comments / Suggestion

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