How to Size R80.30 23500 VSX

[Habib_Rahman_TX]

Hello all, 

We have a 23500 running R80.30 with JHF 237 .

We have fw appi ips anti_bot blades on. 

If I look at cpu utilization from just CPVIEW command, CPU utilization looks normal.

But cpview shows they have 80% + CPU utilization (on /Off) over 30 days period.

We are trying to size this pair.

Question is, how do you size VSX since cpsize me does not support VSX.

Thanks,