Disabled autovacuum prevents transaction ID freezing and leads to wraparound

Disabling autovacuum on tables prevents transaction ID freezing. Transaction IDs age silently at rate of write transactions per day. With 10 TPS workload, wraparound threshold (200M) reached in ~231 days. No performance degradation until sudden failure.

Never disable autovacuum permanently. If temporarily disabled for performance issues, re-enable immediately after resolution. Monitor age(relfrozenxid) on all tables, especially those with autovacuum disabled. Calculate time-to-wraparound: 200,000,000 ÷ (transactions_per_second × 86400).