which of the following scenarios that are not suitable for increasing the memory reuse ratio are?

Question

Options

• AWhile ensuring performance, the user requires a single host to deploy the maximum number of
• BLow virtual machine memory utilization
• CThe memory reuse rate has reached 150% in commercial scenarios
• DReduce customer hardware procurement costs

• A
  9% (4)
• B
  2% (1)
• C
  83% (39)
• D
  6% (3)

Explanation

Option C is the correct answer because a memory reuse ratio of 150% in a commercial production environment is already at or beyond safe operational limits - pushing it higher risks severe performance degradation, memory contention, and service instability. When the ratio is already this high, the appropriate action is to reduce it or add physical memory, not increase it further.

Why the distractors are wrong:

• A is a valid reason to increase the ratio - maximizing VM density on a single host is precisely what memory overcommitment enables.
• B is also valid - low VM memory utilization means physical memory is being underutilized, making it safe and sensible to overcommit and run more workloads.
• D is valid - increasing the reuse ratio means fewer physical hosts are needed, directly lowering hardware procurement costs.

Memory tip: Think of the memory reuse ratio like filling a parking lot beyond its marked spaces. A, B, and D all describe reasons to add more cars (more VMs, empty spaces, cost savings). C describes a lot that's already overflowing - you shouldn't add more cars just because you want to; safety limits have already been hit.

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