Final answer:
SmartPaging using a hard disk as temporary memory can lead to performance speed issues. This is because hard disks are slower than RAM and thus, cannot provide data as fast as physical memory.
Step-by-step explanation:
When SmartPaging uses a hard disk as temporary memory, it could lead to a Performance Speed issue. SmartPaging is a technology that supplements the existing Dynamic Memory balloon mechanism. It's particularly used when the VM needs to start and there isn't enough physical memory available. However, as hard disks are slower compared to physical memory (RAM), this can result in slower system performance. So when a system heavily relies on SmartPaging, a performance speed issue can occur as the hard disk drive (HDD) cannot provide data as quickly as RAM.
Learn more about SmartPaging