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VMware vRealize Operations Performance and Capacity Management by Iwan 'e1' Rahabok

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Chapter 5. Memory Counters

We have covered CPU in depth in the previous chapter. Let's now take a trip down memory lane. We will take the same approach we did with CPU. The following topics will be covered in the chapter:

  • VM memory counters
  • ESXi memory counters
  • Cluster memory counters
  • Memory counters at higher level objects
  • Memory contention guidance

Memory – not such a simple matter

Memory differs from CPU as it is a form of storage. Unlike CPU, which executes instructions as they enter the CPU, memory keeps information for a much longer period of time. We are comparing nanoseconds to seconds (or longer, up to months, depending upon the uptime of your VM). Information is stored in memory in standard block sizes, typically 4 KB or 2 MB. Each block is ...

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