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Oracle Data Guard 11gR2 Administration : Beginner's Guide

You're reading from   Oracle Data Guard 11gR2 Administration : Beginner's Guide If you're an Oracle Database Administrator it's almost essential to know how to protect and preserve your data. This is the perfect primer to Data Guard that covers all the bases with a totally practical, user-friendly approach.

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Product type Paperback
Published in Jun 2013
Publisher Packt
ISBN-13 9781849687904
Length 404 pages
Edition 1st Edition
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Table of Contents (19) Chapters Close

Oracle Data Guard 11gR2 Administration Beginner's Guide
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Pop Quiz Answers
1. Getting Started FREE CHAPTER 2. Configuring the Oracle Data Guard Physical Standby Database 3. Configuring Oracle Data Guard Logical Standby Database 4. Oracle Data Guard Broker 5. Data Guard Protection Modes 6. Data Guard Role Transitions 7. Active Data Guard, Snapshot Standby, and Advanced Techniques 8. Integrating Data Guard with the Complete Oracle Environment 9. Data Guard Configuration Patching 10. Common Data Guard Issues 11. Data Guard Best Practices Index

Time for action – checking the SQL Apply service status


The following steps can be performed to check the SQL Apply service status:

  1. Use the following query on the logical standby database, to check the general SQL Apply status:

    SQL> SELECT * FROM V$LOGSTDBY_STATE;
    
       PRIMARY_DBID SESSION_ID REALTIME_APPLY  STATE
    --------------- ---------- --------------- ---------------
         1319333016          1 Y               APPLYING

    At the STATE column, we can see INITIALIZING, WAITING FOR DICTIONARY LOGS, LOADING DICTIONARY, WAITING ON GAP, APPLYING, and IDLE values, which describe the status of the SQL Apply clearly with their names.

  2. The DBA_LOGSTDBY_LOG view, that we have queried in the Checking the Redo Transport Service Status action, will be very helpful to find the last applied archived log sequence and to check if there are archived log sequences that were received but not applied. Another view V$LOGSTDBY_PROCESS is helpful to control the status of the processes responsible for SQL Apply.

    SQL...
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