While staring OGG extract, alert log is filling up with ORA-01555 logs
If we stop extract, alert is not firing.
This is for upgrading database with zero downtime.
source :
OGG - 11.2.1.0.25 O
DB - 10.2.0.5
Target:
OGG : 12.2.1.0.1
DB - 12.1.0.2
What is relation undo with OGG ?
I have already increased retention and tablespaces...still same