High Utilization

All, my company just bought 2 devices, BIGIP-LTM 6400 and BIGIP-GTM 1500, to use as

 

 

dns server and load balance many virtual servers mainly to support our domain and

 

 

website. But after 1 month, our website has attracted many visitors, the impact is

 

 

BIG-IP LTM 6400 has 80-90% CPU utilization, and GTM has 100% TTM utilization. Is it

 

 

normal or there have been hardware problem or configuration issue ?

 

 

FYI, we also use ASM to speed up access time to accessed our website, is that a

 

 

concern ?

 

 

Thanks in advance..