#Monitoring System

#Architecture Overview

The PostgreSQL Operator Monitoring System includes the following components:

1. Prometheus: Metrics collection and storage
2. Grafana: Data visualization
3. Alertmanager: Alert management
4. Postgres Exporter: Collects PostgreSQL metrics

#Key Metrics

Metric	Description
pg_stat_activity	Current active connections
pg_stat_database	Database statistics
pg_stat_user_tables	User table statistics
pg_stat_bgwriter	Background writer statistics
pg_stat_replication	Replication status

#Alert Rules

1. High Number of Connections: active_connections > max_connections * 0.8
2. Replication Lag: replication_lag > 1048576 bytes
3. Low Cache Hit Ratio: cache_hit_ratio < 0.95
4. Insufficient Disk Space: disk_usage > 80%

#Best Practices

1. Configure reasonable alert thresholds
2. Regularly review monitoring metrics
3. Optimize slow queries
4. Monitor resource usage