Ben Snaidero <bensnaidero@xxxxxxxxxx> writes: > After upgrade completes when running "vacuumdb -p 5432 -U postgres -a -Z > --analyze-in-stages" I get the following error: > * vacuumdb: processing database "#DBNAME#": Generating minimal optimizer > statistics (1 target) vacuumdb: vacuuming of database "#DBNAME#" failed: > ERROR: could not access status of transaction 6095 DETAIL: Could not > open file "pg_xact/0000": No such file or directory.* > After logging into the database using psql and running "VACUUM FULL > #table#" for each table I can see it's an issue with pg_statistic If it's only pg_statistic then you're in luck, because all the data in that is rebuildable. You can try "delete from pg_statistic", and then "vacuum full pg_statistic". I'm not sure that will work though, it may hit the same problem. If so, you need a bigger hammer: "TRUNCATE pg_statistic" will fix it, but you'll need to stop the server and restart with allow_system_table_mods enabled to be allowed to do that. (Turn allow_system_table_mods back off afterwards!) Once you've got an empty pg_statistic, run "ANALYZE;" (as superuser) to rebuild all the stats. Hard to tell what the underlying issue is here --- perhaps pg_upgrade messed up, but it would take some detailed investigation to find out. regards, tom lane
