The prefix used in database object names to identify Replication Agent transaction log objects.
ra_
A character string of 1 to 3 characters.
When Replication Agent generates database object names for any transaction log component in the primary database, it uses the value of the pdb_xlog_prefix parameter as an object name prefix.
Replication Agent uses the value of the pdb_xlog_prefix parameter to recognize its transaction log objects in the primary database. Therefore, if you change the value of the pdb_xlog_prefix parameter after you create transaction log objects, Replication Agent will not be able to find the transaction log objects created with the previous prefix string.
The value of the pdb_xlog_prefix_chars parameter specifies the non-alphabetic characters that can be used in the prefix string.
