I am running Postgresql 9.1 and I can see the datfrozenxid is going high and vacuum process is not bringing it down. And this has been happening on template1 database.
2016-02-12 16:51:50.400 CST [19445][@] : [13-1] WARNING: oldest xmin is far in the past 2016-02-12 16:51:50.400 CST [19445][@] : [14-1] HINT: Close open transactions soon to avoid wraparound problems. 2016-02-12 16:51:50.400 CST [19445][@] : [15-1] LOG: automatic vacuum of table "template1.pg_catalog.pg_database": index scans: 0 pages: 0 removed, 1 remain tuples: 0 removed, 9 remain system usage: CPU 0.00s/0.00u sec elapsed 0.00 sec 2016-02-12 16:51:50.411 CST [19435][@] : [82-1] WARNING: oldest xmin is far in the past 2016-02-12 16:51:50.411 CST [19435][@] : [83-1] HINT: Close open transactions soon to avoid wraparound problems. 2016-02-12 16:51:50.411 CST [19435][@] : [84-1] LOG: automatic vacuum of table "template1.pg_catalog.pg_largeobject": index scans: 0 pages: 0 removed, 0 remain tuples: 0 removed, 0 remain system usage: CPU 0.00s/0.00u sec elapsed 0.00 sec
I vacuum database manually but nothing is working out.