How-To: Upgrade PostgreSQL From 9.3 to 9.4 (In-Place)

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To make use of the JSONB features implemented in 9.4, it may be required that you upgrade your existing PgSQL 9.3 cluster to 9.4+. I cover the basics on how to perform an in-place upgrade.

  • 1. Add the PostgreSQL repo to apt:

    echo "deb utopic-pgdg main" > /etc/apt/sources.list.d/pgdg.list

  • 2. Install the repo’s key:

    wget -q -O - | sudo apt-key add

  • 3. Update apt sources and install postgresql-9.4:

    apt-get update && apt-get install postgresql-9.4 && pg_lsclusters

  • 4. You will now have two pgsql clusters, your existing 9.3 one and the new default 9.4 one. We don’t need the 9.4 one, so we can drop it:

    pg_dropcluster --stop 9.4 main && pg_lsclusters

  • 5. Use pg_upgradecluster to perform an in-place upgrade of your 9.3 cluster:

    pg_upgradecluster 9.3 main && pg_lsclusters

  • 6. You will be left with a single, upgraded 9.4 cluster.

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