O.2. pg_xlogdump renamed to pg_waldump
  PostgreSQL 9.6 and below provided a command named
  
   pg_xlogdump
  
  
  
  to read write-ahead-log (WAL) files.  This command was renamed to
  
   pg_waldump
  
  , see
  
   
    
     pg_waldump
    
   
  
  for documentation of
  
   pg_waldump
  
  and see
  
   the release notes for PostgreSQL 10
  
  for details
    on this change.