Hi Laurenz, Thanks for your reply. We had set max_standby_streaming_delay = -1, but faced storage issues nearly 3.5 TB of storage was consumed.
Regards, Abhishek P -----Original Message----- From: Laurenz Albe <laurenz.a...@cybertec.at> Sent: Friday, January 20, 2023 3:26 PM To: Abhishek Prakash <abhishek.prakas...@infosys.com>; pgsql-gene...@lists.postgresql.org; pgsql-hackers@lists.postgresql.org; usergro...@postgresql.org Subject: Re: ***Conflict with recovery error*** [**EXTERNAL EMAIL**] On Fri, 2023-01-20 at 08:56 +0000, Abhishek Prakash wrote: > We are facing below issue with read replica we did work arounds by > setting hot_standby_feedback, max_standby_streaming_delay and > max_standby_archive_delay, which indeed caused adverse effects on > primary DB and storage. As our DB is nearly 6 TB which runs as AWS Postgres > RDS. > > Even the below error occurs on tables where vacuum is disabled and no > DML operations are permitted. Will there be any chances to see row > versions being changed even if vacuum is disabled. > Please advise. > > 2023-01-13 07:20:12 > UTC:10.64.103.75(61096):ubpreplica@ubprdb01:[17707]:ERROR: canceling > statement due to conflict with recovery > 2023-01-13 07:20:12 > UTC:10.64.103.75(61096):ubpreplica@ubprdb01:[17707]:DETAIL: User query might > have needed to see row versions that must be removed. It could be HOT chain pruning or an anti-wraparound autovacuum (which runs even if autovacuum is disabled). Disabling autovacuum is not a smart idea to begin with. Your best bet is to set "max_standby_streaming_delay = -1". More reading: https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.cybertec-postgresql.com%2Fen%2Fstreaming-replication-conflicts-in-postgresql%2F&data=05%7C01%7Cabhishek.prakash08%40infosys.com%7Ce50f15f9ec4a497669a208dafacc8a3c%7C63ce7d592f3e42cda8ccbe764cff5eb6%7C0%7C0%7C638098053794261389%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2FlYwVKhkjP23vza5yhuJfw6mcOYynDVbNIhnKRBwUu4%3D&reserved=0 Yours, Laurenz Albe
