Ryan MYJ <ryanmyj@xxxxxxxxx> writes: > Currently I'm working on upgrading a postgresql version from 9.3 to 12. The > database size is around 700G. > I finished the pg_upgrade process but when I ran 'analyze_new_cluster.sh' > it stucked at the first log 'vacuumdb: processing database "otdb": > Generating minimal optimizer statistics (1 target)'. > Then I checked the active query, the following query has been running for > several hours: > pid | db | start | lap | > query > ---------+-----------+-------------------------------+-----------------+------------------------------ > 1822933 | otdb | 2023-02-18 03:02:36.035755+08 | 04:56:41.408329 | > ANALYZE pg_catalog.pg_class; You omitted the pg_stat_activity columns that could give some insight into why this is waiting. The first thing I'd think of though is that it's blocked waiting for a lock, in which case looking into pg_locks to see what is blocking it could help. regards, tom lane
