Warning: standby redo logs not configured for thread <n> on <db_unique_name>
(Doc ID 1956103.1)
Last updated on JUNE 04, 2024
Applies to:
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
o With broker configuration of a RAC primary, to a RAC or non-RAC standby database. In this example, the primary is a two nodes RAC - <PRIMARY>, and the standby is a single instance DB - <standby>
o This environment has two online redo log groups, and three standby redo log groups configured for each thread.
o found this warning message from the broker configuration command:
DGMGRL> VALIDATE DATABASE VERBOSE <standby>;
Database Role: Physical standby database
Primary Database: <PRIMARY>
Ready for Switchover: Yes
Ready for Failover: Yes (Primary Running)
Capacity Information:
Database Instances Threads
<PRIMARY> 2 2
<standby> 1 2
Warning: the target standby has fewer instances than the
primary database, this may impact application performance
Temporary Tablespace File Information:
<PRIMARY> TEMP Files: 1
<standby> TEMP Files: 1
Flashback Database Status:
<PRIMARY>: On
<standby>: Off
Data file Online Move in Progress:
<PRIMARY>: No
<standby>: No
Standby Apply-Related Information:
Apply State: Running
Apply Lag: 0 seconds (computed 1 second ago)
Apply Delay: 0 minutes
Transport-Related Information:
Transport On: Yes
Gap Status: No Gap
Transport Lag: 0 seconds (computed 1 second ago)
Transport Status: Success
Log Files Cleared:
<PRIMARY> Standby Redo Log Files: Cleared
<standby> Online Redo Log Files: Cleared
<standby> Standby Redo Log Files: Available
Current Log File Groups Configuration:
Thread # Online Redo Log Groups Standby Redo Log Groups Status
(<PRIMARY>) (<standby>)
1 2 2 Insufficient SRLs
2 2 2 Insufficient SRLs
Future Log File Groups Configuration:
Thread # Online Redo Log Groups Standby Redo Log Groups Status
(<standby>) (<PRIMARY>)
1 2 0 Insufficient SRLs
Warning: standby redo logs not configured for thread 1 on <PRIMARY>
2 2 0 Insufficient SRLs
Warning: standby redo logs not configured for thread 2 on <PRIMARY>
Database Role: Physical standby database
Primary Database: <PRIMARY>
Ready for Switchover: Yes
Ready for Failover: Yes (Primary Running)
Capacity Information:
Database Instances Threads
<PRIMARY> 2 2
<standby> 1 2
Warning: the target standby has fewer instances than the
primary database, this may impact application performance
Temporary Tablespace File Information:
<PRIMARY> TEMP Files: 1
<standby> TEMP Files: 1
Flashback Database Status:
<PRIMARY>: On
<standby>: Off
Data file Online Move in Progress:
<PRIMARY>: No
<standby>: No
Standby Apply-Related Information:
Apply State: Running
Apply Lag: 0 seconds (computed 1 second ago)
Apply Delay: 0 minutes
Transport-Related Information:
Transport On: Yes
Gap Status: No Gap
Transport Lag: 0 seconds (computed 1 second ago)
Transport Status: Success
Log Files Cleared:
<PRIMARY> Standby Redo Log Files: Cleared
<standby> Online Redo Log Files: Cleared
<standby> Standby Redo Log Files: Available
Current Log File Groups Configuration:
Thread # Online Redo Log Groups Standby Redo Log Groups Status
(<PRIMARY>) (<standby>)
1 2 2 Insufficient SRLs
2 2 2 Insufficient SRLs
Future Log File Groups Configuration:
Thread # Online Redo Log Groups Standby Redo Log Groups Status
(<standby>) (<PRIMARY>)
1 2 0 Insufficient SRLs
Warning: standby redo logs not configured for thread 1 on <PRIMARY>
2 2 0 Insufficient SRLs
Warning: standby redo logs not configured for thread 2 on <PRIMARY>
Changes
o The warning messages only return from the new 12c broker command - VALIDATE DATABASE
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |