"Ivan Zolotukhin" <ivan.zolotukhin@xxxxxxxxx> writes: > When I run VACUUM FULL VERBOSE ANALYZE it processes several > tables/indexes and than hangs (at least I tried to wait for 30 mins > and nothing happened) on one particular table "education" which is > quite ordinary I think. When it hangs I see in `ps auxww` process with > "VACUUM waiting" in its status. It's definitely waiting for a lock then. > Below I pasted last lines concerning above table from VACUUM output > (it stops after the last line): > ... > INFO: analyzing "public.education" > INFO: "education": scanned 674 of 674 pages, containing 40653 live > rows and 1111 dead rows; 3000 rows in sample, 40653 estimated total > rows If it hangs there then I'd venture that it's trying to get writer's lock (RowExclusiveLock) on pg_statistic so it can store the new statistic rows. Or possibly pg_class. You should be looking for locks on the system catalogs not locks on "education" itself. regards, tom lane
