Jaime Casanova <jcasanov(at)systemguards(dot)com(dot)ec> writes:
> + WARNING: could not open statistics file "pg_stat_tmp/pgstat.stat":
> Stale NFS file handle
> this is an ext2 filesystem in an external hard drive, could be fs corruption?
Evidently the kernel is confused. It seems more like busted in-memory
state than on-disk state, but that's just a guess.
> anything i could do to fix this without dropping my 90Gb test env?
Did you try rebooting the machine?
regards, tom lane