Software, including databases, is predominantly run on Linux operating systems, both in the cloud and on-premises environments. Metrics such as %CPU, load average, I/O wait, and free memory are commonly used to measure performance. However, interpreting these metrics correctly can be challenging. In this interactive live demo, we will run a workload and explore the intricacies of performance monitoring together using the "top" command. We will also discuss the limitations and common misinterpretations that can occur when relying solely on these metrics.