You can use new Replication Server configuration parameter to fine-tune Replication Server performance.
sqt_init_read_delay – the amount of time an SQT thread sleeps while waiting for an SQM read before checking for new instructions in its command queue.
sqt_max_read_delay – the maximum amount of time an SQT thread sleeps while waiting for an SQM read before checking for new instructions in its command queue.