AWS - RDS and Relational Databases
After launching a read replica, it does not respond to read queries. Which misconfiguration is the most probable cause?
After launching a read replica, it does not respond to read queries. Which misconfiguration is the most probable cause?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Check connectivity
If the read replica does not respond, network access is a common issue.Step 2: Verify security groups
The replica's security group must allow inbound traffic from the application or clients.Final Answer:
The read replica's security group does not allow inbound traffic from the application -> Option BQuick Check:
Multi-AZ or backups do not block reads; region difference affects latency [OK]
Quick Trick: Check security group inbound rules for read replica [OK]
Common Mistakes:
- Assuming multi-AZ disables reads on replicas
- Ignoring network access controls
- Confusing backup settings with read availability
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