Tom Lane a écrit :
> gl@lbn.fr writes:
> > I'm experiencing a strange problem with PostgreSQL 7.4.9.
> > One of my database production servers has 2 large databases, it's still
> > possible to connect to them and pass queries, but the pg_database
> > system table is empty, which prohibits such actions as dumping the
> > databases.
>
> Sounds like XID wraparound. Does vacuuming pg_database make the problem
> go away? If so, I'd recommend doing database-wide vacuums in all your
> databases ASAP. And then instituting a regular vacuum maintenance schedule.
>
> regards, tom lane
>
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Thanks for your answers.
Indeed, the vacuum schedule was not regularly executed. Manually
launching the procedure solved the problem.
Regards,
GL
