Bertrand Drouvot: Welcome to pg_walviz: PostgreSQL WAL segment visualizer

Introduction The purpose of this blog post is to introduce pg_walviz , a new tool to visualize PostgreSQL WAL segment files. pg_waldump is very useful to display a human-readable rendering of the WAL. However, sometimes we also want to see how records are physically stored in a segment: the WAL pages, record fragments, continuation records, alignment padding, block references, full-page images and raw bytes. Welcome to pg_walviz It is a read-only tool that displays a WAL segment in a local browser. It presents the same WAL data at three levels: The segment overview displays all the WAL pages a