Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 
 Home
 E-mail Us
 Oracle Articles
New Oracle Articles


 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog


 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Analysis
 Design
 Implementation
 Oracle Support


 SQL Tuning
 Security

 Oracle UNIX
 Oracle Linux
 Monitoring
 Remote s
upport
 Remote plans
 Remote
services
 Application Server

 Applications
 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S
upport  
 Development  

 Implementation


 Consulting Staff
 Consulting Prices
 Help Wanted!

 


 Oracle Posters
 Oracle Books

 Oracle Scripts
 Ion
 Excel-DB  

Don Burleson Blog 


 

 

 


 

 

   
 

Start Logical Oracle instance apply tips

Oracle Database Tips by Donald BurlesonDecember 9, 2015

 

Oracle Data Guard - Log Management Services

Physical Standby Database

The following diagram shows various processes of log management services on the physical standby database. In this diagram, log writer is used to transfer redo log entries from the primary to the standby database. Also, standby redo logs are created and used at the standby site.  A log switch on the primary database triggers archiving on the standby database.

Figure 5.2 - Log management service on physical standby database

Logical Standby Database

The logical Oracle instance provides a unique feature in which a database can coexist in recovery and query mode simultaneously. The log apply service on a logical Oracle instance uses the LogMiner engine of Oracle database. When the log apply service is initiated on the standby database, the LogMiner engine reads the archived redo logs from the standby_archive_dest directory and converts these redo logs into SQL statements. These statements are then applied to Oracle instance by SQL Apply operations. The log apply service can be started using:

ALTER DATABASE START LOGICAL Oracle instance APPLY;

When this statement is executed in the standby database, it starts a Logical Standby Process (LSP) which controls the MRP on the standby site.

The following diagram shows the complete log management service on a logical standby database. In this case, LGWR is configured for log transport.

Figure 5.3 - Showing Log Management Services on Logical Standby Database


The above text is an excerpt from the book: Oracle Data Guard Handbook


��  
 
 
Oracle Training at Sea
 
 
 
 
oracle dba poster
 

 
Follow us on Twitter 
 
Oracle performance tuning software 
 
Oracle Linux poster
 
 
 

 

Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


                    









Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


 

Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.