How do I check Data Guard apply lag?

Query V$DATAGUARD_STATS and review the Apply Lag value.

How do I check Data Guard transport lag?

Query V$DATAGUARD_STATS and review the Transport Lag value.

How do I detect archive gaps?

Use SELECT * FROM V$ARCHIVE_GAP.

What is RMAN Backup Validation?

RMAN Backup Validation verifies Oracle backup integrity and recoverability without performing a restore.

What does RESTORE DATABASE VALIDATE do?

It verifies that RMAN backups can be restored successfully without actually restoring files.

How do I detect Oracle block corruption?

Use V$DATABASE_BLOCK_CORRUPTION and RMAN VALIDATE DATABASE CHECK LOGICAL.

What are the most important Oracle DBA interview topics?

Oracle Architecture, RMAN, Backup and Recovery, Data Guard, RAC, Performance Tuning, Security, and Troubleshooting are the most important Oracle DBA interview topics.

Is Oracle DBA still a good career in 2026?

Yes. Oracle DBA remains a strong career path due to the widespread use of Oracle databases in enterprise environments.

What Oracle version should I learn in 2026?

Oracle 19c and Oracle 23ai are the most valuable Oracle database versions to learn in 2026.

ORA-39213 Metadata processing is not available

Applies to:

Oracle Enterprise Linux – Version: 7

Oracle Database 11gR2

Description:

Expdp utility going to failed with following error:

ORA-39213: Metadata processing is not available

After some research I found that it is caused by the XSL stylesheets not setup/load properly.

Solution:

To fix the problem do the following steps:

Connect AS SYSDBA and execute the following to reload the stylesheets:

SQL> execute dbms_metadata_util.load_stylesheets;

Re-test the expdp, now it is working fine.

Your comments, especially which will help us improve the functionality, will be greatly appreciatedJ

👉 Check our complete guide: Oracle Error Codes Guide

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About the Author

Rana Abdul Wahid is an experienced Oracle Database Administrator with expertise in Oracle Database Administration, Oracle Data Guard, RMAN Backup & Recovery, Oracle RAC, Oracle E-Business Suite, Performance Tuning, and High Availability Solutions.

Through this blog, he shares practical Oracle DBA solutions, troubleshooting guides, interview preparation resources, and production-tested best practices for database professionals worldwide.