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When standby redo logs are multiplexed then they are lot of issues in the redo transport and also one member of standby redo logs got corrupted/inconsistence which further causes issues.
This recommendation was also as per best practices given in following document:
As I said I will continuos monitoring my enviroment after drop one member of each standby redolog group and for some time everything was ok.
But yesterday I notice the problem again. Then I notice that the max number of archiver process in my source database is set to 30 however there are just 4 in my downstream database. I do not know if this is the problem or maybe is another thing.
Thanks in advance. I wait for your answer.
Do you have, please any idea? In the alert log i can see to messages like:
kcrrvslf: inactive RFS archival for log 4 thread 1 sequence 9362
kcrrvslf: inactive RFS archival for log 5 thread 1 sequence 9361
kcrrvslf: inactive RFS archival for log 6 thread 1 sequence 9359
ORA-16038: cannot archival log 5 sequence number 9361
ORA-00001:unique constrain (.)
Thanks and excuse me.