• large
  • xlarge
  • 2xlarge
  • 4xlarge
  • 8xlarge
  • 10xlarge
  • 12xlarge
  • 16xlarge
  • 24xlarge
  • 32xlarge

Example of R5.
Start from db.r5.large with 1 core, 2 vCPU and 16GB Memory.
Up to db.r5.24xlarge 48 Cores, 96 vCPU and 768GB Memory.

  • T4g
  • T3
  • M7g
  • M6i
  • M6g

  • R7g — up to 16xlarge
  • R6i — up to 32xlarge
    • R6id with NVMe-based SSD up to 7.6TB
  • R6g — up to 16xlarge
  • R5 — up to 24xlarge

R7g instances are powered by Arm-based AWS Graviton3 processors. DDR5 memory.
R6i instances are powered by 3rd-gen Intel Xeon Scalable processors (Ice Lake).
R6g instances are powered by Arm-based AWS Graviton2 processors.

General Purpose (SSD): gp2, gp3
Provisioned IOPS (SSD): low latency, I/O intensive
Magnetic: low cost per GB, backwards compatible

T3 is general purpose and M5 is better T3. R5 is better and memory optimized.

Either start with M5 or R5 for real-production use. R5 is better because the ceiling is higher in case your business succeeds.

You can find IOPS in Databases > Configuration when your instance reached certain size.

Official Documentation

Activity of RDS. Top SQL / most expensive queries. Adjustable to 5m, 1h, 5h, 24h, 1w, all. OS Metrics.

Official Documentation

Since PostgreSQL 10.

  1. Databases > your-database-name > Monitoring (tab) > Monitoring (dropdown middle right) > Enhanced Monitoring

  2. CloudWatch Logs > Log groups > RDSOSMetrics

OS metrics

CloudWatch metrics and alarms. Performance Insights actually exports metrics to CloudWatch.

Grant Superuser to a user/role:

GRANT rds_superuser TO user-or-role;