[Solved] Why do read replicas not improve write performance in AWS RDS? — Ans: Because all writes must go to the primary database instance | AWS

AWS - RDS and Relational Databases

Why do read replicas not improve write performance in AWS RDS?

ABecause all writes must go to the primary database instance

BBecause replicas reject all queries

CBecause replicas only store backups

DBecause replicas encrypt data and slow down writes

Step-by-Step Solution

Solution:

Step 1: Understand write handling in RDS
Writes are only accepted by the primary instance to maintain data consistency.
Step 2: Clarify replica roles
Replicas serve read queries and replicate data asynchronously; they do not accept writes.
Final Answer:
Because all writes must go to the primary database instance -> Option A
Quick Check:
Writes go only to primary = B [OK]

Quick Trick: Writes always go to primary, replicas serve reads only [OK]

Common Mistakes:

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Why do read replicas not improve write performance in AWS RDS?