How can it be determined that a database is experiencing difficulties in processing a large volume of requests?

To determine that a database is experiencing difficulties handling a large volume of requests, you can look for the following signs:

• Increased response time: Requests start taking longer than usual.
• Connection errors or timeouts: Clients receive errors due to overload.
• High CPU and memory usage: Monitoring the database server resources shows abnormally high utilization.
• Request queues: In some DBMS, you can see a buildup of pending requests.
• Error and warning logs: The database logs may contain messages about locks, deadlocks, or exceeding limits.

Monitoring can be done using built-in DBMS tools, external monitoring systems (Prometheus, Grafana), or query profiling.

Example: if the execution time of a simple SELECT suddenly increases with the number of concurrent requests, it signals performance issues.