Use the dsi_cmd_batch_size database connection configuration parameter to control the size of a DSI command batch.
dsi_cmd_batch_size controls the size of the buffer a DSI uses to send commands to a replicate data server. When the DSI configuration batch is set on, the DSI places as many commands as will fit into a single command batch before sending it to the replicate. In some cases, increasing the value of dsi_cmd_batch_size improves throughput by providing the replicate database with more work per command batch.