Laurenz - Thanks for responding. The URL posted is taking me to "19.6. Upgrading a PostgreSQL Cluster"... Is there another one that is meant for OS upgrades. We do not want to upgrade postgres, we just want to upgrade OS only. Thanks again. -----Original Message----- From: Laurenz Albe <laurenz.albe@xxxxxxxxxxx> Sent: Monday, June 26, 2023 12:36 PM To: Murthy Nunna <mnunna@xxxxxxxx>; pgsql-admin@xxxxxxxxxxxxxxxxxxxx Subject: Re: Linux in-place upgrade On Mon, 2023-06-26 at 17:13 +0000, Murthy Nunna wrote: > We are planning an in-place upgrade of Linux level from RHEL 7 to RHEL 8 or RHEL 9. > We have several PG clusters running on this server using different versions of postgres (pg12, pg13 and pg14). > > We have couple of plans: > > 1. Shutdown clusters, unmount disks that contain postgres data and wals, upgrade Linux, > remount postgres disks and restart postgres clusters > 2. Same as above but reinstall postgres (pg12, pg13 and pg14) before restarting postgres clusters > > Questions: > 1. Will 1 or 2 or both above work? > 2. Is there any official documentation above OS upgrades? The documentation is here: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.postgresql.org_docs_current_upgrading.html&d=DwIFaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=0wrsmPzpZSao0v32yCcG2Q&m=dr5mJ5o4-e7RnK5eDhw_s3KXv0QZoDPYsOKPbwrSJET4XBmkr-T3qhnUQCGc_gUS&s=3WcKsIB6Ua9jg6c7THIRy-bJ2ZwZuE4MGlUHtxM-ybs&e= It depends on how you installed PostgreSQL. If you used binary packages, Option 1 should work fine. Don't forget to reindex all indexes on strings! Yours, Laurenz Albe
