Florian G. Pflug wrote:

> Since we didn't really reach an agreement on how xid_age should behave,
> I've reverted it back to the original version. So with this patch,
> xid_age will just force assignment of a xid.

Is this really a good idea?  I'm repeating myself, but a query like

select age(xmin) from bigtable

could accelerate Xid wraparound.  If the server is running close to the
limit it could cause a shutdown to prevent the actual wraparound.

Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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