When sizing an acceleration resource for PernixData FVP, we look to recommend a resource that can contain the working set of data for the VMs using that resource. The majority of the time this isn’t a problem. However, we recently came across a use case where the working set of the VM was so large that the VM used the whole flash device and began garbage collection after just 3 days. Let’s take a closer look at what’s going on and how we found a feasible solution for the customer.