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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 FREE CHAPTER 2. Memory Performance Design 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

Using VM Monitoring

The VM Monitoring service, which is serviced by VMware Tools, evaluates whether each VM in the cluster is running or not. Regular heartbeats and I/O activity from the VMware Tools process will be checked by the VM Monitoring service to determine the running guest.

Sometimes, VM heartbeats or I/O activity is not received by the VM Monitoring service because the guest operating system fails or VMware Tools is not being allocated time to complete its tasks. If the VM Monitoring service does not hear those heartbeats, then it declares that the VM has failed and the VM is rebooted to restore service.

The VM Monitoring service also monitors a VM's I/O activity just to avoid unnecessary resets. If there are no heartbeats received within the failure interval, the I/O stats interval (a cluster-level attribute) is checked. The I/O stats interval (by default, 120...

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