Replication Server provides different serialization methods for specifying the level of parallelization.
The method you choose depends on the amount of contention you expect between parallel threads and your replication environment. Each serialization method defines how much of a transaction can start before it must wait for the previous transaction to commit.
Use the dsi_partitioning_rule parameter to reduce the probability of contention without reducing the degree of parallelism assigned by the serialization method.
alter connection to SYDNEY_DS.pubs2 set dsi_serialization_method to 'wait_for_commit'
While providing commit consistency, the serialization method defines whether the beginning of the transaction waits for the previous transaction to become ready to commit or if the beginning of the transaction can be processed earlier.