What is monitoring in IT?

Monitoring: definition and goals

Monitoring continuously answers the question: is everything working, and how well? Monitoring tools collect metrics from servers, networks, databases and applications and show them in dashboards. When thresholds are exceeded or outages occur, they alert the responsible people by email, SMS or chat. This happens around the clock, including nights and weekends when nobody is watching a screen.

The aim is to detect disruptions early, shorten downtime and speed up the search for causes, ideally before a warning turns into a real outage. At the same time, the data provides a basis for decisions: when is more capacity needed, which pages are slow, and is the system meeting the agreed availability?

What is monitored

Typical levels are the infrastructure (processor, memory, disk space, network), the application (response times, error rates, queues) and external availability (uptime monitoring via HTTP checks, including the expiry of certificates and domains). Application performance monitoring and real user monitoring also show how visitors actually experience the site.

Common tools include Zabbix, Prometheus with Grafana, or the monitoring services of cloud providers. Together with logs and traces, monitoring forms the basis of observability: metrics show that something is wrong, while logs and traces help to understand why. The better these signals work together, the faster the cause of a disruption can be narrowed down.

Real-world example: a furniture manufacturer’s dealer portal

A furniture manufacturer runs a dealer portal through which retailers place orders and check delivery status. One Friday evening the server’s disk fills up, the database stops and the portal is unreachable all weekend. Nobody notices until Monday, when the first dealers call.

Monitoring would have caught this earlier: a warning at 80 percent disk usage would have informed those responsible days in advance, and an availability check would have raised the alarm the moment the outage began. The manufacturer sets up both and defines who is notified outside business hours.

Benefits, limits and common mistakes

Good monitoring shortens outages, makes bottlenecks visible and provides evidence for customers. Too many alerts, however, lead to alert fatigue, so important messages get lost. Other mistakes: alerts that nobody owns, or monitoring that checks only the server but not whether the function actually works for customers.

Nano Concepts sets up monitoring for websites, stores and applications, defines sensible thresholds and escalation paths and, if you wish, takes over monitoring and incident resolution as part of maintenance and support, so that problems are solved before your customers notice them. On request, you receive regular reports on availability, load times and utilization.

• Check availability from the customer’s perspective, not just server metrics
• Monitor disk, memory, certificates and domain expiry
• Choose alert thresholds so that only actionable items are reported
• Clearly define who responds to alerts and how they can be reached
• Review metrics regularly and plan capacity ahead