redolog shipping
I have created a replication environment has already been running for 10 months(Oracle 11g release 1). The capture process is downstreams that is why I need send the redo from source to downstreams database, in my case I have the two database in the same server. Now I am trying to improve my enviroment and I have three questions.
Why sometimes I need to restore some Redos in the source database because the database downstreams did not receive them and did not catch so the capture process waits for them?
Why when I consult the Redos that were not received by the downstream see the following?:
sequence 1-2-3 were received****sequence 4-5 were not received****sequence 5 and up were received. The avobe with the downstream database always up without problems.
So when I restore the sequences 4 and 5 the capture process continuos its work normally.
Is there any resolution gap like in Oracle Dataguard?
I appreciate any suggestions.