A day in the life of a VMware Admin
To understand what performance actually is, it is always good to begin with the customer. As shared in the previous chapter, the SDDC is providing a service, not a system. We have seen this in almost all customers. Whether the application team or VM owner pays for the service or not, it is a service. The existence of a chargeback model is practically optional. VM owners no longer own, hence care, about the underlying infrastructure.
Here is a common story often told in the virtualization community, which will resonate with you as an IaaS provider:
A VM owner complains to you that her VM is slow. It was not slow yesterday. Her application architect and lead developer have verified that:
The VM CPU and RAM utilization did not increase. They are also within a healthy range. The application team has verified that the CPU run queue is also in the healthy range.
The disk latency is good. It is below 10 milliseconds.
The network isn't dropping any packets.
There is...
