Re: pg_dump or hardware?

andrea suisani <andrea.suisani@opinioni.net> writes:
> pg_dump: ERROR:  could not open relation with OID 201327173
> pg_dump: SQL command to dump the contents of table "nominativi" failed: PQendcopy() failed.
> pg_dump: Error message from server: ERROR:  could not open relation with OID 201327173

Hmm ... what do you get from

select oid from pg_class where relname = 'nominativi';
select relname from pg_class where oid = 201327173;

If the first returns 201327173 while the second doesn't return anything,
then I'd wonder about corruption of pg_class's OID index.  REINDEXing it
might help.  I don't remember whether 7.4 makes you use a standalone
backend to reindex system catalogs --- see its REINDEX man page for
details.

            regards, tom lane