What monitoring tools have you used?

For monitoring databases and servers, I used the following tools:

• Prometheus + Grafana — for collecting metrics and visualizing the status of servers and databases.
• Zabbix — for comprehensive infrastructure monitoring, including databases, with trigger and alert configuration.
• Percona Monitoring and Management (PMM) — a specialized tool for monitoring MySQL and MongoDB.
• Oracle Enterprise Manager — for monitoring and managing Oracle Database.
• Nagios — for basic monitoring of service availability and status.

These tools help track performance, load, errors, and respond promptly to issues.