Unlogged Aurora PostgreSQL tables and read replicas

0

When setting an Aurora RDS PostgreSQL table to unlogged, will those unlogged tables still be available in read replicas?

已提问 10 个月前680 查看次数
1 回答
1
已接受的回答

Hi, you probably guessed the answer when you asked the question: the answer is no and for the clear reason that unlogged table means no existing logs to send to read replicas.

Confirmed by https://aws.amazon.com/blogs/database/understand-replication-capabilities-in-amazon-aurora-postgresql/

The UNLOGGED and TEMPORARY tables aren’t replicated, much like with physical replication.
 This is because the changes to these tables don’t have entries in the transaction logs 
(Write-Ahead Logs), and it’s impossible for the logical worker process to capture the changes 
happening on these tables.

Best, Didier

profile pictureAWS
专家
已回答 10 个月前
  • Hi Didier, We were able to query 'UNLOGGED' tables from read replica till Aurora Postgres version 12.12. But they are not available after upgrade to 13.10.

    How come they were available on read replica prior to version 12.12? Is it a change that was implemented within Aurora Postgres 13.10?

您未登录。 登录 发布回答。

一个好的回答可以清楚地解答问题和提供建设性反馈,并能促进提问者的职业发展。

回答问题的准则