What tools and solutions exist for monitoring database health and performance?

To monitor the state and performance of databases, various tools and solutions are used that help track load, response time, resource usage, and identify bottlenecks.

Main tools:

• Built-in DBMS tools: e.g., pg_stat_statements in PostgreSQL, Performance Schema in MySQL, Dynamic Management Views (DMV) in SQL Server.
• Monitoring systems: Prometheus with exporters for databases, Zabbix, Nagios, Datadog, New Relic.
• Query profilers and analyzers: EXPLAIN, slow query log, Percona Toolkit.
• Logging and tracing: collection and analysis of query and error logs.

Example of using Prometheus for PostgreSQL monitoring:

# Add PostgreSQL exporter in Prometheus configuration
- job_name: 'postgres'
  static_configs:
    - targets: ['localhost:9187']

The exporter collects metrics that can be visualized in Grafana for performance analysis and system health.