Re: vacuum confusion

From: Richard Huxton <dev(at)archonet(dot)com>
To: John Sidney-Woollett <johnsw(at)wardbrook(dot)com>
Cc: postgres general <pgsql-general(at)postgresql(dot)org>
Subject: Re: vacuum confusion
Date: 2005-02-11 09:25:56
Message-ID: 420C7A24.1030309@archonet.com
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John Sidney-Woollett wrote:
> I've got a 7.4.6 db running on linux where we've been vacuuming "full"
> the database each night, and have recently switched to "vacuum analyse"
> instead.
>
> We keep seeing this message at the end of the vacuum run:
>
> WARNING: some databases have not been vacuumed in 2013308218 transactions
> HINT: Better vacuum them within 134175429 transactions, or you may have
> a wraparound failure.
> VACUUM
>
> Why are we seeing this message when the only databases in this cluster
> is the one we are vacuuming (each night), and template0 and template1?
>
> Is there something that we're not doing right?

Are you doing template0/1 too? The transaction IDs are shared between
all databases AFAIK. Before the numbers wrap-around any "low" numbers
need to be replaced by a "frozen" marker (I think it's 0 or 1).

--
Richard Huxton
Archonet Ltd

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