if you need to do this.

To make the backup, you can use the "pg_dumpall" command from the

version you are currently running. For best results, however, try

to use the "pg_dumpall" command from PostgreSQL 7.4beta4, since

to use the "pg_dumpall" command from PostgreSQL 7.4beta5, since

this version contains bug fixes and improvements over older

versions. While this advice might seem idiosyncratic since you

haven't installed the new version yet, it is advisable to follow

like this:

mv /usr/local/pgsql /usr/local/pgsql.old

After you have installed PostgreSQL 7.4beta4, create a new database

After you have installed PostgreSQL 7.4beta5, create a new database

directory and start the new server. Remember that you must execute

these commands while logged in to the special database user account

(which you already have if you are upgrading).