RDS Proxy is a managed database proxy that pools and shares database connections. It’s especially valuable for serverless apps like Lambda that can open a flood of short-lived connections and overwhelm a database.
The problem it solves
Lambda can scale to thousands of concurrent executions, each trying to open a database connection — exhausting the DB’s connection limit. RDS Proxy pools and reuses connections, improving scalability and failover. The tell is “Lambda opening too many DB connections” or “connection exhaustion.”
Test yourself
A Lambda function scales to thousands of concurrent executions and exhausts the RDS database’s connection limit. What resolves this?
- Increase the Lambda timeout
- Use Amazon RDS Proxy to pool connections
- Switch to a larger EBS volume
- Add a NAT Gateway
👉 Click to reveal the answer & explanation
Correct answer: B. RDS Proxy pools and shares database connections, preventing connection exhaustion from many concurrent Lambdas. A longer timeout (A) doesn’t reduce connections; storage (C) and networking (D) are unrelated to connection limits.
Related topics
Amazon RDS · AWS Lambda · Aurora Serverless
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