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Every Lambda invocation opens its own Postgres connection and the database chokes past a few hundred concurrent executions. What fixes it?

Postgres spends memory on a backend process per connection, and serverless fan-out treats that as an invitation. Pooling at the proxy layer is the standard cure; pinning is the catch.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

Postgres spends memory on a backend process per connection, and serverless fan-out treats that as an invitation. Pooling at the proxy layer is the standard cure; pinning is the catch.

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