December 2017
Beginner
598 pages
14h 7m
English
Content preview from Mastering VMware vSphere 6.5
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Memory metrics
RAM could be overcommitted (assigning VMs more memory than the host physical RAM) on an ESXi host, and this was one of the historical advantages of VMware products. However, just because you can, it does not necessarily mean that you should.
Now, in most cases, it is not recommended anymore because it will degrade the performance of your environment (for example, memory ballooning or swapping also have an impact on storage). So, the right memory sizing could be really important, not only for the workload but also for high-availability aspects (we will discuss this more in Chapter 13, Advanced Availability in vSphere 6.5).
Note also that there are more and more workloads that are becoming more memory bound—consider, for example, ...
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