PostgreSQL 2200H Error: Causes and Solutions Complete Guide

PostgreSQL Error 2200H: Sequence Generator Limit Exceeded PostgreSQL error code 2200H...

venerdì 12 giugno 2026 New tab

TL;DRAI

PostgreSQL error 2200H occurs when sequences hit MAXVALUE (~2.1B for SERIAL/INT4), blocking inserts—a showstopper for high-volume systems. Migrate to BIGINT or UUID columns and monitor sequence usage above 80% to prevent production outages and eliminate exhaustion risk.

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PostgreSQL Error 2200H: Sequence Generator Limit Exceeded

PostgreSQL error code 2200H occurs when a sequence object reaches its defined MAXVALUE (or MINVALUE for descending sequences) and has no CYCLE option to wrap around. This is most commonly seen on tables using SERIAL (INT4) primary keys, which cap out at approximately 2.1 billion. Once the limit is hit, every subsequent INSERT attempting to use that sequence will fail immediately.

Top 3 Causes

1. SERIAL Column Hitting the INT4 Ceiling (~2.1 Billion)

SERIAL uses a 4-byte integer under the hood. High-volume systems — logging tables, event trackers, order systems — can exhaust this faster than expected.