What is one scenario that is NOT suitable for increasing memory reuse ratio?

The scenario that is not suitable for increasing the memory reuse ratio is when memory reuse in commercial scenarios has reached 150%. This indicates that the memory utilization is already maximized beyond the physical capacity. When the memory reuse ratio exceeds 100%, it implies that the system is effectively using more virtual memory than is physically available, which can lead to issues such as performance degradation, system instability, and increased complexity in managing memory.

In this context, aiming to further increase the memory reuse ratio would likely be counterproductive, as it signifies that the current utilization is already at an unsustainable level. Therefore, additional efforts to boost memory reuse in a situation where it's already at 150% would not only be unnecessary but could potentially harm the operational reliability of the system.

The other scenarios, such as reducing hardware procurement costs and the need for maximizing the number of virtual machines per host, present practical goals for improving memory use efficiency. Low virtual machine memory utilization typically suggests that there is room for optimization, thereby aligning well with strategies aimed at enhancing the memory reuse ratio.