The point of optimizing your infrastructure is to protect your companies revenue, while minimizing the cost of operating your infrastructure. Your goal should be to ensure that users don't encounter high-latency, otherwise known as bad performance or worse, unfulfilled or dropped requests, all the while making your venture remains a sustainable endeavor.
The three pillars of web application performance are as follows:
- CPU utilization
- Memory usage
- Network bandwidth
I have intentionally left disk access out of the key consideration metrics, since only particular workloads executed on an application server or data store are affected by it. Disk access would rarely ever impact the performance of serving a web application as long as application assets are delivered by a Content Delivery Network (CDN). That said, still keep an eye on any unexpected...