Merlin Moncure <mmonc...@gmail.com> writes: > What if the subsequent dataloss was in fact a symptom of the first > outage? Is in theory possible for data to appear visible but then be > eaten up as the transactions making the data visible get voided out by > some other mechanic? I had to pull a quick restart the first time and > everything looked ok -- or so I thought. What I think was actually > happening is that data started to slip into the void. It's like > randomly sys catalogs were dropping off. I bet other data was, too. I > can pull older backups and verify that. It's as if some creeping xmin > was snuffing everything out.
Might be interesting to look at age(xmin) in a few different system catalogs. I think you can ignore entries with age = 2147483647; those should be frozen rows. But if you see entries with very large ages that are not that, it'd be suspicious. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers