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## PostgreSQL upgrades
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Note: *before* doing the entire major upgrade procedure, it is worth
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considering upgrading PostgreSQL to "backports". There are no officiel
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"Debian backports" of PostgreSQL, but there is an
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<https://apt.postgresql.org/> repo which is *supposedly* compatible
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with the official Debian packages. The only (currently known) problem
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with that repo is that it doesn't use the tilde (`~`) version number,
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so that when you do eventually do the major upgrade, you need to
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manually upgrade those packages as well.
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PostgreSQL is special and needs to be upgraded manually.
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1. make a full backup of the old cluster:
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