"Hiroshi Inoue" <Inoue(at)tpf(dot)co(dot)jp> writes:
> It seems that conflicts of the initialization of some backends cause
> above NOTICE messages.
> Those backends would use the same XIDTAGs for the same relations
> in case of LockAcquire()/LockRelease() because xids of those backends
> are'nt set before starting the first command. When one of the backend
> call LockReleaseAll(),it would release all together.
Oooh, that would nicely explain Keith's observation that it seems to
happen at backend startup. I guess we need to select an initial XID
earlier during startup than we now do?
regards, tom lane