The following bug has been logged on the website:
Bug reference: 16559
Logged by: Duy Khuong
Email address: pduykhuong(at)gmail(dot)com
PostgreSQL version: 12.3
Operating system: Red Hat Enterprise Linux release 8.0 (Ootpa)
Description:
Upgrade PostgresSQL server form 9.6.2 to 12.3 version.
Version 9.6.2 autovacuum work fine, but after upgrade to version 12.3 when
autovacuum process run on tables belong pg_catalog schema, almost
transactions in state "waiting" , after a few seconds autovacuum process was
cancel and transactions was roolback.
I run vacuum manual on tables belong pg_catalog schema , problem is same.
Plz help me.Thank so much