pg_xlogdump Command

1st chunk of `doc/src/sgml/appendix-obsolete-pgxlogdump.sgml`

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<sect1 id="pgxlogdump" xreflabel="pg_xlogdump">
  <title><command>pg_xlogdump</command> renamed to <command>pg_waldump</command></title>

   <indexterm>
     <primary>pg_xlogdump</primary>
     <see>pg_waldump</see>
   </indexterm>

   <para>
    PostgreSQL 9.6 and below provided a command named
    <command>pg_xlogdump</command>
    <indexterm><primary>pg_xlogdump</primary></indexterm>
    to read write-ahead-log (WAL) files.  This command was renamed to <command>pg_waldump</command>, see
    <xref linkend="pgwaldump"/> for documentation of <command>pg_waldump</command> and see
    <link linkend="release-prior">the release notes for PostgreSQL 10</link> for details
    on this change.
   </para>

</sect1>

Title: pg_xlogdump Command

Summary

The pg_xlogdump command has been renamed to pg_waldump in PostgreSQL 10 and later versions, with documentation available for the new command. This change was made to provide a more accurate and descriptive name for the command, which is used to read write-ahead-log (WAL) files, and users of PostgreSQL 9.6 and below should be aware of this change when upgrading to newer versions.