Follow these instuctions:

  • Download and install PostgreSQL
  • Download the appropriate Postgres JDBC4 driver. You can also download it directly from the Maven Central Repository and copy the JAR into your container's common lib directory or in the XWiki webapp (in WEB-INF/lib)
  • Start PostgreSQL
    • On Mac you could issue the following shell commands to start/stop PostgreSQL 9.1 (adapt to your version and to your setup):
      sudo -u postgres /Library/PostgreSQL/9.1/bin/pg_ctl start -D /Library/PostgreSQL/9.1/data
      sudo -u postgres /Library/PostgreSQL/9.1/bin/pg_ctl stop -D /Library/PostgreSQL/9.1/data
  • Create the xwiki user and the xwiki database:
    • Using the psql tool:

      In a shell, start the PostgreSQL interactive terminal: psql -U <replace_with_your_admin_user_eg_postgres>

      Create the xwiki database:

      CREATE DATABASE xwiki
      WITH OWNER = <replace_with_your_admin_user_eg_postgres>
      ENCODING = 'UNICODE'
      TABLESPACE = pg_default;

      Verify that the xwiki database is listed in the available databases: \l

      Connect to the xwiki database: \connect xwiki

      Create a xwiki user: CREATE USER xwiki PASSWORD 'xwiki' VALID UNTIL 'infinity';

      Verify that the xwiki user is listed in the available users: \du

      Give all the permissions to the xwiki user: GRANT ALL ON SCHEMA public TO xwiki;

    • Using the createuser and createdb programs:

      Make sure that the createuser and createdb programs are in your $PATH. The example below also assumes that the postgres user exists in your setup (this is the default on Linux).

      Create the xwiki user: createuser xwiki -S -D -R -P -Upostgres

      Create the xwiki database: createdb xwiki -Eunicode -Oxwiki -Upostgres

      Note that if you need to remove this DB at some point you can issue:dropdb -Upostgres xwiki

  • Tell XWiki to use this database. To do this, edit the WEB-INF/hibernate.cfg.xml file where you have expanded the XWiki WAR file and uncomment the PostgreSQL part. Make sure to review the connection.url property. For example a typical value would be:<property name="connection.url">jdbc:postgresql://localhost:5432/xwiki</property>

Multiwiki Status

Prior to XWiki 4.5M1, multiwiki mode was not fully working specifically database creation was not working. The implementation was trying to create one database for each subwiki. This is what we call the database mode. You could still use XWiki on PostGreSQL but you had to manually create the databases.

Since XWiki 4.5M1, we've switched by default to use the schema mode, i.e. a subwiki is represented as a Schema in the database.

The mode used is controlled by a property in hibernate.cfg.xml:

<property name="xwiki.virtual_mode">schema|database</property>

If you use the database mode, be aware that the issue still exists.

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