I did a stupid mistake. I run the final pg_dumpall without switching to single-user-mode first. With "final" I mean that the dump should be transferred to a different machine. After the dump the old machine was shut down forever. My mistake was that I stopped the services, but one process was still alive and this process inserted to the database after pg_dumpall has started. I guess I am not the first one who did this stupid mistake. What do you think? Wouldn't it be polite to add a note about this topic to the docs? Here are the docs for pg_dumpall: https://www.postgresql.org/docs/current/static/app-pg-dumpall.html How could the wording look like? I am not a native speaker .... Or do you have a better/different idea? Regards, Thomas Güttler -- Thomas Guettler http://www.thomas-guettler.de/ I am looking for feedback: https://github.com/guettli/programming-guidelines -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general