Sourabh Agarwal shows us a couple of levers we have in improving replication performance:
When SQL Server replication is used on environments with high traffic OLTP systems, users often need to adjust the agent profile parameters to increase the throughput of the log reader and distribution agents to keep up with the workload. We recently performed a series of tests to measure the performance of log reader and distribution agents while changing some of the parameters for these agents. This blog summarizes the outcomes and conclusions from this testing.
Read on for the relevant parameters.