Transaction ID wraparound provides no gradual performance warning before failure

Transaction ID wraparound risk accumulates silently without performance degradation. CPU, memory, I/O remain normal. No query slowdown. Failure is sudden and absolute when threshold crossed. Cannot be detected through traditional capacity monitoring.

Implement explicit monitoring of age(relfrozenxid) per table. Do not rely on performance metrics (CPU, I/O, query latency) to detect wraparound risk. Set alerts at 150M-180M transaction ID age to provide remediation window before 200M threshold.