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vSphere High Performance Essentials by Christian Stankowic

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Chapter 4. Understanding Memory Resources

In the last chapter, we took a look at how vSphere utilizes CPU resources and optimizes VM configurations in order to get the best performance. You also learned about the role of NUMA and vNUMA in high-performance setups. In this chapter, you will learn the memory resource essentials and how reclamation mechanisms such as page sharing, swapping, ballooning, and compression play a role in workload performance.

In this chapter, we will dive deep into the following topics:

  • Physical and virtual memory
  • Memory mapping and utilization
  • Transparent Page Sharing
  • Ballooning
  • Compression and swapping

Understanding memory types

In vSphere, memory resources are divided into the following categories:

  • Physical memory
  • Virtual memory ...

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