Operating system upgrades on PostgreSQL nodes using streaming replication

From: Rahat Agivetova <rahat(at)ebi(dot)ac(dot)uk>
To: pgsql-admin(at)lists(dot)postgresql(dot)org
Subject: Operating system upgrades on PostgreSQL nodes using streaming replication
Date: 2023-11-08 12:29:36
Message-ID: 216fb159-31c7-e1ee-e792-c9eee255ed1c@ebi.ac.uk
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Hi All,

We are planning to upgrade the operating system from Centos 7 on Primary
and Standby PostgreSQL nodes that use streaming replication to RHEL 8.
What is the recommended order to upgrade OS from Centos 7 to RHEL 8?
Standby first, then Primary? Can there be a small time gap between the
upgrades or not?

Thanks,
Rahat

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