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://www.postgresql.org/docs/current/upgrading.html 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
