Field notes from production

What Oracle Platinum Support actually requires before any 19.29 → 19.32 upgrade, why the patch README and MOS note contradict each other on the mitigation, and how to apply it on RAC One Node with or without downtime.

Same error text, three completely different root causes — a missing system privilege, a missing object privilege, and a broken DB link dependency. Generalizing from the last migration is how this one catches people out.

Three different inventory problems, three different fixes. detachHome, comps.xml permissions, and the CRS=true flag — understanding which one you're actually looking at before the maintenance window.

Most of what fills a DataPump import log after a multi-version jump traces back to a handful of root causes. Grouping by error code first turns a wall of text into a few categories worth understanding individually.

PRVE-03180, duplicate ASM password files, and a stale Oracle Home in the inventory. These three cover the large majority of precheck failures I've seen in the field.

Diagnosing redo pressure during a heavy DataPump import, and the multiplexing detail that's easy to miss on a RAC One Node setup.

No ORA error, no warning in the import log — just a compliance gap that quietly survives the migration and surfaces at the next LMS audit.