Neon: Max client connections reached (too many clients)
FATAL: remaining connection slots are reserved for non-replication superuser connections
Immediate Remediation
bash
DATABASE_URL="...-pooler.c-10.aws.neon.tech/neondb?sslmode=require"
Root Cause Analysis
Connection starvation due to lack of PgBouncer pooled endpoint in serverless functions.
Verification & Guardrails
- Check that all lambdas use the pooler connection string.
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