Why is system monitoring necessary and how does it help in detecting problems?

System monitoring is the process of collecting, analyzing, and displaying data about the state and performance of IT infrastructure and applications.

It helps detect problems through:

• Early failure detection: monitoring resources (CPU, memory, disk, network) allows noticing anomalies before they lead to a failure.

• Root cause analysis: logs and metrics help understand why a problem occurred.

• Automatic alerts: the monitoring system can send notifications when thresholds are exceeded, speeding up the team’s response.

• Performance optimization: monitoring data helps identify bottlenecks and improve performance.

For example, if the load on a server suddenly increases, monitoring will record this and send a warning, allowing timely measures to be taken and avoiding downtime.