MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0 Configuring NDB Cluster Send Buffer Parameters

The NDB kernel employs a unified send buffer whose memory is allocated dynamically from a pool shared by all transporters. This means that the size of the send buffer can be adjusted as necessary. Configuration of the unified send buffer can accomplished by setting the following parameters:

You can use the ndbinfo.transporters table to monitor send buffer memory usage, and to detect slowdown and overload conditions that can adversely affect performance.