"Thomas F. O'Connell" <tfo@sitening.com> writes:
> In the meantime, should I leave the database online while I attempt
> to recover? It's still unclear to me whether postgres will restart
> with invalid page headers. I certainly can't run pg_dumpall, for
> instance.
Has the database successfully checkpointed since the last error
occurrence? If so, I wouldn't foresee any problem with a shutdown.
If checkpoints are failing then you probably won't be able to shut
down without getting the same error. (Use pg_controldata if you're
not sure about when the last checkpoint happened.)
> I'm glad that there have so far been only 3 relations affected... :(
You mean, three that you know about :-(
regards, tom lane