Dear all, I just wanted to report that I found similar error "found multixact from before relminmxid" that Alexandre Arruda and Jeremy Finzel recently reported and discussed with Andres Freund. (Thanks all for good notes.)
I get this error when vacuuming a specific table in my high-transaction OLTP workload database. I am running PostgreSQL 9.5.8 on AWS RDS. I'm going to try to pg-repack the table and will look to upgrade to 9.5.9 (though it's not presently available). Best, Sean -- Sean McIntyre WARBY PARKER <https://www.warbyparker.com/?utm_source=employee&utm_medium=email&utm_content=signature&utm_campaign=signature&cvosrc=email.employee.signature> Summer reading calls for summery frames <https://www.warbyparker.com/summer-2018?utm_source=signature&utm_medium=email&utm_campaign=Summer-2018&cvosrc=email.signature.summer-2018> We made an app! Download it here <https://itunes.apple.com/app/apple-store/id1107693363?pt=1427163&ct=Employee%20Email%20Signature&mt=8> Follow us: Facebook <http://www.google.com/url?q=http%3A%2F%2Fwww.facebook.com%2Fwarbyparker&sa=D&sntz=1&usg=AFrqEzfUEaV6C9BaTQ8cI-VKdanu2UUQbw> , Twitter <http://www.google.com/url?q=http%3A%2F%2Ftwitter.com%2Fwarbyparker&sa=D&sntz=1&usg=AFrqEzczMD6HXAtHLBzviQV_EtD3ckoJVQ> , Instagram <http://instagram.com/warbyparker>, Snapchat <https://www.snapchat.com/add/warbyparker>