> By the time the startup process
> releases the AccessExclusiveLock acquired by the proposed
> UNLOGGED -> normal conversion process, that relfilenode
> needs to be either fully copied or unlinked all over again.
> (Alternately, find some other way to make sure queries don't
> read the half-copied file.)
About this issue: how are AccessExclusiveLocks released on
the standby when the master crashes?
