F5 Viprion Disk Volumes statistic

Hi,

We are using monitoring tools to monitor our Viprion that configured with 4 vCMP. Our Viprion has 2 blades on each chassis. We have some concerns that in our monitoring tool, we are seeing 'cache memory' and 'physical memory' being highly used by 98-100%. My question is whether such high utilization in Viprion is normal? why i did not see double total cache and physical memory when we use 2 blades?

Thanks