pg_upgradecluster Man page

PG_UPGRADECLUSTER(1) Debian PostgreSQL infrastructure PG_UPGRADECLUSTER(1)


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

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

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 /var/lib/postgresql/newversion/name.


-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

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

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

-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.

–rename new cluster name
Use a different name for the upgraded cluster.

–old-bindir directory
Passed to pg_upgrade.

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:


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 or
pg_upgrade operation.

All data from the old version cluster has been dumped/reloaded into
the new one. The old cluster still exists, but is not running.

Failing scripts will abort the upgrade. The scripts are called as the
user who owns the database.

When –mode=dump and upgrade hook scripts are used, pg_restore is
invoked with –no-data-for-failed-tables.


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


Martin Pitt

Debian 2016-03-30 PG_UPGRADECLUSTER(1)