Modifying the TCP window size indirectly with the TCP send/receive buffer size can be a very effective method for increasing network throughput in some scenarios. Two to three or even more times the original throughput can sometimes be achieved. However, it is important to remember that the network characteristics can (and often do) change over time because of changes in usage patterns, hardware, software, or other infrastructure.
We strongly recommend that you use this method to calculate the optimum value at the same time of day and under the same network usage patterns that are intended to be in use during the planned live migration or replication tasks. We also recommend that you recalculate the setting periodically in order to account for changing network conditions.