Philip Molter <philip@datafoundry.net> writes:
> I am using 7.1.2.
Drat.
Don't suppose you want to dig in there with a debugger when it happens?
You must be seeing some hard-to-replicate problem in VACUUM's
tuple-chain-moving logic. That stuff is pretty hairy, and I doubt
anyone will be able to intuit what's wrong without close examination
of a failure case.
regards, tom lane
