connection limit for role PostgreSQL Origin: Data Last updated 13 Oct 2026

FATAL: too many connections for role "x"

The role reached its per-role CONNECTION LIMIT (often set by hosting providers or free tiers).

Exact message you may see too many connections for role
Seen on: PostgreSQL

Meaning

Different from max_connections: this cap applies to one role. Free database tiers set small limits.

Common causes

  • Role connection limit reached
  • Pools too large for the plan
  • Leaked connections

⚡ Quick fix

  1. Reduce pool size
  2. Use the provider’s pooler
  3. Raise the role limit if you control it: ALTER ROLE app CONNECTION LIMIT 50

Detailed fix by platform

PostgreSQL

  1. SELECT rolname, rolconnlimit FROM pg_roles WHERE rolname = 'app';

How to diagnose

  1. Limit — rolconnlimit?
  2. Usage — count in pg_stat_activity

🔧 Still not fixed?

Many errors look alike. If the steps above didn’t solve it, one of these is probably what you’re facing:

Where this error sits

Origin: Data. Errors that are often confused with or caused by this one (click to open):

1040 — MySQL ERROR 1040 (08004): Too many connections (MySQL)10403D000 — FATAL: database "x" does not exist (PostgreSQL)3D000508 — HTTP 508 Loop Detected (Resource Limit Is Reached) (HTTP)508509 — HTTP 509 Bandwidth Limit Exceeded (HTTP)50953100 — ERROR: could not extend file "base/…": No space left on device (PostgreSQL)5310053300 — FATAL: sorry, too many clients already / remaining connection slots are reserved for non-replication superuser connections (PostgreSQL)53300AllocationFailed — Azure VM: AllocationFailed / ZonalAllocationFailed — Allocation failed. We do not have sufficient capacity for the requested VM size (Azure)AllocationFailedconnection closed — server closed the connection unexpectedly — This probably means the server terminated abnormally before or while processing the request. (PostgreSQL)connection closedconnectio…

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