can't shrink relation

"Ed L." <pgsql@bluepolka.net> writes:

What does this mean?
WARNING: Rel pg_class: TID 17/13: InsertTransactionInProgress 106004881 -
can't shrink relation

It's harmless. In 7.4 it's been downgraded to a NOTICE, and I wonder if
we shouldn't push it lower yet.

regards, tom lane