When monitoring performance, what else did you pay attention to besides slow queries? (CPU, I/O operations)

In addition to slow queries, when monitoring database performance, it is important to pay attention to the following aspects:

• CPU Usage: High CPU load may indicate inefficient queries, complex calculations, or index problems.
• I/O Operations: Frequent and long read/write operations on disk can slow down performance, especially if the disk becomes a bottleneck.
• Locks and Contention: Check for locks, deadlocks, and resource waits that may be slowing down query execution.
• Memory (RAM): Insufficient memory can lead to frequent disk access, reducing performance.
• Caching Parameters: The efficiency of the database buffer cache.
• Query Statistics and Execution Plans: Analyzing plans helps identify inefficient operations.

For example, if the CPU is at 100% utilization and queries are not very complex, it is worth checking indexes and query plans. If there is a lot of I/O, it may be necessary to optimize data structures or increase cache size.