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vSphere High Performance Cookbook - Second Edition

You're reading from   vSphere High Performance Cookbook - Second Edition Recipes to tune your vSphere for maximum performance

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Product type Paperback
Published in Jun 2017
Publisher
ISBN-13 9781786464620
Length 338 pages
Edition 2nd Edition
Tools
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Authors (3):
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Christopher Kusek Christopher Kusek
Author Profile Icon Christopher Kusek
Christopher Kusek
Prasenjit Sarkar Prasenjit Sarkar
Author Profile Icon Prasenjit Sarkar
Prasenjit Sarkar
Kevin Elder Kevin Elder
Author Profile Icon Kevin Elder
Kevin Elder
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Toc

Table of Contents (11) Chapters Close

Preface 1. CPU Performance Design 2. Memory Performance Design FREE CHAPTER 3. Networking Performance Design 4. DRS, SDRS, and Resource Control Design 5. vSphere Cluster Design 6. Storage Performance Design 7. Designing vCenter on Windows for Best Performance 8. Designing VCSA for Best Performance 9. Virtual Machine and Virtual Environment Performance Design 10. Performance Tools

Monitoring a host-swapping activity

Excessive memory demand can cause severe performance problems for one or more VMs on an ESXi host. When ESXi is actively swapping from the memory of a VM to disk, the performance of that VM will degrade. The overhead of swapping a VM's memory to a disk can also degrade the performance of other VMs because the VM expects to be writing to RAM (speeds measured in nanoseconds), but it is unknowingly writing to disk (speeds measured in milliseconds).

The counters in vSphere Client for monitoring the swapping activity are as follows:

  • Memory Swap In Rate: The rate at which memory is being swapped in from the disk.
  • Memory Swap Out Rate: The rate at which memory is being swapped out to the disk.
  • Swapped: The total amount of data that is sitting inside the .vswp hypervisor-level swap file. However, this doesn't tell you anything about the current...
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vSphere High Performance Cookbook - Second Edition - Second Edition
Published in: Jun 2017
Publisher:
ISBN-13: 9781786464620
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