What's New with Monitoring in PostgreSQL 19

PostgreSQL 19, still in beta at the time of writing, introduces a range of monitoring and observability enhancements intended to make lock contention, WAL activity, maintenance operations, replication behavior, and transaction wraparound risks easier to diagnose. Key changes include enabling lock-wait logging by default, allowing log verbosity to be configured by process type, separating autoanalyze logging from autovacuum logging, and adding full-page-image byte metrics to WAL statistics, query plans, and maintenance logs. New wait events expose WAL write stages and file-, pipe-, and program-based COPY I/O, while messages received through logical replication, foreign data wrappers, or dblink now receive standard local log formatting. The release also adds pg_get_multixact_stats() for inspecting multixact usage and disk consumption, raises the advance warning threshold for transaction and multixact wraparound from 40 million to 100 million transactions, and introduces additional system views. Monitoring-tool maintainers are advised to update log parsers, metric collectors, wait-event dictionaries, configuration validation, and alert thresholds to accommodate the new behavior and fields.

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