Databases are predominantly run on Linux operating systems in 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 using the "top" command. We will also discuss the limitations and common misinterpretations when relying solely on these metrics.