The REPLBATCHSIZE option specifies the number of client files that are to be replicated in a batch, within the same server transaction. This option affects only the node replication processes and works with the REPLSIZETHRESH option to improve node replication processing.
The REPLBATCHSIZE option limits the number of files in a transaction and the REPLSIZETHRESH option limits the number of bytes in a transaction. The transaction ends when either the REPLBATCHSIZE threshold or the REPLSIZETHRESH threshold is reached.
replbatchsize 25000