Stefan Kaltenbrunner <[EMAIL PROTECTED]> writes:
> maybe the following buildfarm report means that we need a new theory  :-(


Vacuum's always had a race condition: it makes a list of rel OIDs and
then tries to vacuum each one.  It narrows the window for failure by
doing a SearchSysCacheExists test before relation_open, but there's
still a window for failure.

The rel in question is most likely a temp rel of another backend,
because sanity_check is running by itself and so there shouldn't
be anything else happening except perhaps some other session's
post-disconnect cleanup.  Maybe we could put the check for "is
this a temp rel of another relation" into the initial list-making
step instead of waiting till after relation_open.  That doesn't
seem to solve the general problem though.

                        regards, tom lane

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