Book Image

VMware Performance and Capacity Management, Second Edition - Second Edition

By : Sunny Dua
Book Image

VMware Performance and Capacity Management, Second Edition - Second Edition

By: Sunny Dua

Overview of this book

Performance management and capacity management are the two top-most issues faced by enterprise IT when doing virtualization. Until the first edition of the book, there was no in-depth coverage on the topic to tackle the issues systematically. The second edition expands the first edition, with added information and reorganizing the book into three logical parts. The first part provides the technical foundation of SDDC Management. It explains the difference between a software-defined data center and a classic physical data center, and how it impacts both architecture and operations. From this strategic view, it zooms into the most common challenges—performance management and capacity management. It introduces a new concept called Performance SLA and also a new way of doing capacity management. The next part provides the actual solution that you can implement in your environment. It puts the theories together and provides real-life examples created together with customers. It provides the reasons behind each dashboard, so that you get the understanding on why it is required and what problem it solves. The last part acts as a reference section. It provides a complete reference to vSphere and vRealize Operations counters, explaining their dependencies and providing practical guidance on the values you should expect in a healthy environment.
Table of Contents (28 chapters)
VMware Performance and Capacity Management Second Edition
Credits
Foreword
Foreword
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Part 1
Part 2
Part 3
Index

CPU counters at the VM level


The following screenshot shows the VM CPU counters in vCenter 6.0, taken from the C# client:

VM CPU counters

The Collection Level column does not apply to vRealize Operations. Changing Collection Level does not impact which counters get collected by vRealize Operations. It collects all counters from vCenter using its own filter, which you can customize.

In vCenter, there are 17 counters available at the VM level, and 12 of them are available at the virtual core level too. This means that a VM with two vCPUs (or two virtual cores) will have 40 counters (2 x 12 + 16). A vSphere environment with 1,000 VMs with two vCPUs as the average VM size will have 40,000 counters!

In vCenter, you can only look at two types of counters at the same time. Because VMs can impact each other's performance, you need a management tool that can cut across all of these 40 counters across many VMs in all vCenter Servers. vRealize Operations allows you to slice and dice all of these counters...