Проверить размерность счетчика транзакций.

select max(age(datfrozenxid)) as oldest_current_xid, current_setting('autovacuum_freeze_max_age') as autovacuum_freeze_max_age, ((2^((min(typlen)*8)-1))-1::int8) as max_old_xid from pg_database cross join pg_type where typname = 'xid';