CloudWatch Dashboard

Links#

Amazon RDS metrics
PostgreSQL monitoring statistics

1. Dashboard Rows#

Row	CloudWatch Metrics	Statistic	Display
Overview	`CPUUtilization`	Average	time series by DB instance
Overview	`FreeableMemory`	Average	memory headroom
Overview	`DatabaseConnections`	Average	connection pressure
Overview	`ReadLatency`, `WriteLatency`	p95 / Average	storage latency
Drilldown	`ReadIOPS`, `WriteIOPS`	Average	I/O pressure
Drilldown	`Deadlocks`	Sum	DB contention signal
Drilldown	`AuroraReplicaLagMaximum`	Maximum	Aurora replica health
Capacity	`VolumeBytesUsed`	Average	Aurora storage used trend
Debug	latency split and IOPS split	Average / p95	storage troubleshooting

2. Notes#

CloudWatch dashboard 只能覆盖 RDS 平台层。
PostgreSQL SQL 级别问题仍然需要 postgres_exporter / pg_stat_statements。

如果你当前看的对象是 Aurora PostgreSQL cluster，优先使用:
    VolumeBytesUsed
    AuroraReplicaLagMaximum

如果 cluster 没有 reader，replica lag panel 可能没有数据。