Provided by: postgresql-common_154ubuntu1.1_all bug


       pg_upgradecluster - upgrade an existing PostgreSQL cluster to a new major version.


       pg_upgradecluster [-v newversion] oldversion name [newdatadir]


       pg_upgradecluster upgrades an existing PostgreSQL server cluster (i. e. a collection of
       databases served by a postmaster instance) to a new version specified by newversion
       (default: latest available version).  The configuration files of the old version are
       copied to the new cluster.

       The cluster of the old version will be configured to use a previously unused port since
       the upgraded one will use the original port. The old cluster is not automatically removed.
       After upgrading, please verify that the new cluster indeed works as expected; if so, you
       should remove the old cluster with pg_dropcluster(8). Please note that the old cluster is
       set to "manual" startup mode, in order to avoid inadvertently changing it; this means that
       it will not be started automatically on system boot, and you have to use pg_ctlcluster(8)
       to start/stop it. See section "STARTUP CONTROL" in pg_createcluster(8) for details.

       The newdatadir argument can be used to specify a non-default data directory of the
       upgraded cluster. It is passed to pg_createcluster. If not specified, this defaults to

       Please note that this program cannot upgrade clusters which use tablespaces. If you use
       those, you have to upgrade manually.


       -v newversion
           Set the version to upgrade to (default: latest available).

       --logfile filel
           Set a custom log file path for the upgraded database cluster.

           Set the default locale for the upgraded database cluster. If this option is not
           specified, the locale is inherited from the old cluster.

           Like --locale, but only sets the locale in the specified category.

       -m, --method=dump|upgrade
           Specify the upgrade method.  "dump" uses pg_dump(1) and pg_restore(1), "upgrade" uses
           pg_upgrade(1).  The default is "dump".

       -k, --link
           In pg_upgrade mode, use hard links instead of copying files to the new cluster.  This
           option is merely passed on to pg_upgrade.  See pg_upgrade(1) for details.


       Some PostgreSQL extensions like PostGIS need metadata in auxiliary tables which must not
       be upgraded from the old version, but rather initialized for the new version before
       copying the table data. For this purpose, extensions (as well as administrators, of
       course) can drop upgrade hook scripts into /etc/postgresql-common/pg_upgradecluster.d/.
       Script file names must consist entirely of upper and lower case letters, digits,
       underscores, and hyphens; in particular, dots (i. e. file extensions) are not allowed.

       Scripts in that directory will be called with the following arguments:

       <old version> <cluster name> <new version> <phase>


           A virgin cluster of version new version has been created, i. e.  this new cluster will
           already have template1, but no user databases. Please note that you should not create
           tables in this phase, since they will be overwritten by the dump/restore operation.

           All data from the old version cluster has been dumped/reloaded into the new one. The
           old cluster still exists.

       The scripts are called as the user who owns the database.


       pg_createcluster(8), pg_dropcluster(8), pg_lsclusters(1), pg_wrapper(1)


       Martin Pitt <>