In the context of vertical capacity scaling, which aspects should be monitored?

In the context of vertical capacity scaling, monitoring CPU usage and memory allocation is crucial because these resources typically dictate the performance and capability of a single instance of a server or virtual machine. Vertical scaling involves adding more power (CPU, RAM) to an existing server to handle increased load without needing to change the architecture or distribution of an application.

The CPU is the central processing unit that performs the computations required by applications. If the CPU is constantly at high usage, it indicates that the server may be overloaded and requires more processing power. Memory allocation is also critical because applications depend on RAM to run efficiently. Insufficient memory may lead to slow performance or even application crashes.

While other aspects like network speed and disk space are important to monitor in general system management or for certain types of applications, they are not as directly tied to vertical scaling as CPU and memory. Application design and software version, though necessary for overall performance and compatibility, do not specifically relate to the concept of scaling resources vertically. Therefore, focusing on CPU and memory is most relevant when considering how to effectively scale vertically to meet performance demands.