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Consider the following statements about scaling metrics.
1. Processor utilisation suits compute bound workloads.
2. Queue length or request latency may suit others better.
3. Processor utilisation is the correct metric for every workload.

  • A.1 and 2 only
  • B.3 only
  • C.1 only
  • D.All of them

Answer: A

The first two are correct. The third is wrong, and scaling a memory bound service on processor use produces a system that never scales when it actually needs to. Queue depth is often the honest signal where processor use is a misleading one.

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