Gunnar Morling • 8/5/2025

Postgres Replication Slots: Confirmed Flush LSN vs. Restart LSN

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This technical article delves into PostgreSQL replication slots, explaining the crucial distinction between the restart_lsn and confirmed_flush_lsn attributes. It covers their roles in tracking consumer progress, handling concurrent transactions, and ensuring safe WAL retention, which is vital for troubleshooting replication and optimizing production database environments.

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#postgresql #Cdc #Logical Replication
Postgres Replication Slots: Confirmed Flush LSN vs. Restart LSN

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