Extract on ADG: OGG-00868 The number of Oracle redo threads (2) is not the same as the number of checkpoint threads (1). (Doc ID 2004661.1)

Last updated on JULY 17, 2017

Applies to:

Oracle GoldenGate - Version 12.1.2.1.0 and later
Information in this document applies to any platform.

Symptoms

I have primary DB with dataguard.
after switchover, the original DB is set as ADG.
when trying to start extract on ADG, it hits following error:

ERROR OGG-00868 The number of Oracle redo threads (2) is not the same as the number of checkpoint threads (1). EXTRACT groups on RAC systems should be created with the THREADS parameter (e.g., ADD EXT <group name>, TRANLOG, THREADS 2, BEGIN...).

v$log shows only one thread #1.

both new primary and this ADG are single instance. what causes the error above?



Cause

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