Downtime rarely announces itself - it just happens, usually at 3am. Server monitoring catches problems early, sometimes before visitors ever notice. Here is what to monitor, which free tools to use, and how to set alerts that actually help.

Table of Contents

What to Monitor

  • Uptime - is your site reachable around the clock?
  • CPU - sustained high usage signals problems.
  • RAM - low memory causes crashes.
  • Disk space - a full disk stops everything.
  • Bandwidth - spikes can indicate attacks.
  • SSL expiry - an expired certificate breaks HTTPS.

Uptime Monitoring

Free services like UptimeRobot check your URL every minute from around the world and alert you the moment it goes down. Set it up on your homepage, login and checkout - one monitor per critical path.

Resource Monitoring

On a VPS or dedicated server, watch resources with top, free -h and df -h, or install a dashboard tool like Netdata or Grafana for graphs and history. Set thresholds - for example, alert at 80% disk usage and sustained 90% CPU.

Setting Smart Alerts

  1. Alert immediately on downtime and high severity issues.
  2. Use multiple channels - email plus SMS or a chat bot.
  3. Set thresholds that are meaningful (avoid alert fatigue).
  4. Always alert on SSL expiry - you have 30 days to act.

Frequently Asked Questions

Do I need to monitor a shared hosting account?

Uptime monitoring is still worth it - you want to know if your site goes down regardless of where it is hosted. Your host handles server-level monitoring.

What does a server dashboard cost?

Free tools cover most needs. Professional monitoring platforms (Pingdom, Datadog) add depth for a subscription - worth it for business-critical sites.

Monitoring turns surprise outages into managed events. Set up free monitors today, and let your alerts tell you about problems before your customers do.