What should I monitor in production?

Errors: exceptions with stack traces (Sentry)
Uptime: external checks every minute with alerts
Performance: response times, slow queries, Core Web Vitals from real users
Infrastructure: CPU, memory, disk, database connections
Business metrics: sign-ups, orders, failed payments
Logs: structured and searchable, with audit logs for sensitive actions

By Reejan R Gopan · Software & Systems Engineer, Dubai, UAE

Why: you find and fix problems before customers report them.

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