ORACLE DATABASE

Automation in the Oracle ecosystem is a double-edged sword. When systems like Autonomous Recovery Service (ARS)  work, they are absolute lifesavers - offloading heavy background lifting, ensuring zero-data-loss protection, and preventing manual human error. However, when an automated mechanism hits a database restore failure issue, an unhandled corner case, or a misconfigured VCN/policy, it can quietly stall, block recovery pipelines, or trigger subtle background wait event spikes. Issue 1: During a database restore from backup, the creation process failed with: the password of TDE wallet cannot be null . The root cause turned out to be a UI/orchestration gap: the console failed to prompt for the TDE wallet password during setup, causing the automated restore job to immediately fail when attempting to open the wallet. The Root Cause: A Identity Crisis Between Oracle Wallet and AWS KMS So, what actually went wrong behind the scenes? As part of an infrastructure modernization effor...

  In the modern security landscape, Transparent Data Encryption (TDE) is no longer optional, it is a fundamental requirement for protecting data at rest. While the ALTER TABLESPACE command seems straightforward, the underlying mechanics of how Oracle handles online encryption especially in environments with Data Guard can be surprising. Recently, I’ve been exploring the nuances of online TDE operations. Here are the key takeaways and "gotchas" every DBA should know before hitting 'enter' on that encryption command. 1. The Power of Online Encryption Oracle allows you to encrypt an existing unencrypted tablespace while the database is open and being accessed by users. The syntax is simple: SQL ALTER TABLESPACE TEST ENCRYPTION ONLINE ENCRYPT; Pro Tip: In Oracle 19c, the default algorithm is AES128. If your security standards require AES256, you should set the parameter tablespace_encryption_default_algorithm to 'AES256' or specify it explicitly in yo...