<ul><li>The combination of Lambda, RDS Proxy, and Aurora in the application architecture often led to the Lambda concurrency limit of 1000 being exceeded.</li><li>Connection pinning, caused by statements with a text size greater than 16 KB, led to excessive database connections in RDS Proxy.</li><li>To address the issue, a new RDS Proxy was created specifically for the problematic API, and the affected repository was redirected to use this proxy.</li><li>By routing queries triggering connection pinning to the new proxy, the Lambda concurrency was stabilized, and the Aurora connection limits were not exceeded.</li></ul>

Avoiding Connection Pinning in Lambda and RDS Proxy with NestJS and Proxy Splitting

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