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Ghost in the Datafile: Fixing “Empty Block” Corruption in Oracle
A common frustration for DBAs occurs after identifying a corrupted index or table. You drop the object, expecting the error to vanish, but RMAN backups still fail and Data Guard continues to report a gap. Even though the block is no longer part of a segment, it remains “physically” corrupted in the eyes of the…
Oracle 26ai: Out-of-Place Database Patching Explained
Patching a database often means turning it off, which is a problem for businesses. In Oracle 26ai, there is a great new feature called Local Rolling Out-of-Place Patching. This feature helps you move your database to a new, patched “Oracle Home” on the same server without stopping database (or short downtime). Here is how it…
Exadata Snapshot PDB Clone with ACFS
When working with Exadata, there are several ways to create snapshot PDB clones. The main options are: Each one works well, but the best choice really depends on your environment and what you need. Exascale Clone This is clearly the most modern solution. It’s fast, simple, and designed for large environments. But in reality, not…
ACFS Replication Background Process Stopped After Upgrade to 23ai
If you recently moved from Oracle 19c to Oracle 23ai, you might find your file replication has stopped. Your status shows “Stopped”, and no matter how many times you try to start it, nothing happens. The Problem: The “SCAN” Name In the old version (19c), replication usually connected directly to a specific server’s name or…
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Oracle DBA Insights 