>>>>> "Andrew" == Andrew Dunstan <and...@dunslane.net> writes:
Andrew> I'd be curious to know how this state came about. Me too, but available information is fairly sparse: PG 12.5, in a container, backing a (personal) instance of Gitlab; the only database admin operations should have been those done by Gitlab itself, but I have not audited that codebase. No information on any history of crashes. The missing pg_attrdef row appeared to be missing or not visible in the heap, not just missing from indexes; it did not show up in queries whether seqscan or indexscan was used. Available time did not permit trying to use pageinspect on pg_attrdef. This gitlab ticket refers to the same incident: https://gitlab.com/gitlab-org/omnibus-gitlab/-/issues/6047 (which actually contains a new relevant fact that hadn't been mentioned in the IRC discussion, which is that the problem affected multiple tables, not just one.) -- Andrew (irc:RhodiumToad)
