NDB Cluster Configuration Files Type or units bytes Default 256K Range 32K - 16M Restart Type N (NDB 8.0.13) The batch size is the size of each batch sent from each data node. Most scans are performed in parallel to protect the MySQL Server from receiving too much data from many nodes in parallel; this parameter sets a limit to the total batch size over all nodes. The default value of this parameter is set to 256KB. Its maximum size is 16MB. This parameter is used to determine the total amount of memory to allocate on this node for shared send buffer memory among all configured transporters. If this parameter is set, its minimum permitted value is 256KB; 0 indicates that the parameter has not been set. For more detailed information, see Section 23.3.3.14, “Configuring NDB Cluster Send Buffer Parameters” . This parameter is  false  by default. This forces disconnected API nodes (including MySQL Servers acting as SQL nodes) to use a new connection to the cluster rather than attempting to re-use an existing one, as re-use of connections can cause problems when using dynamically-allocated node IDs. (Bug #45921) • DefaultOperationRedoProblemAction This parameter can be overridden using the NDB API. For more information, see Ndb_cluster_connection::set_auto_reconnect(), and Ndb_cluster_connection::get_auto_reconnect(). • AutoReconnect • TotalSendBufferMemory Version (or later) NDB 8.0.13 Type or units bytes Default 0 Range 256K - 4294967039 (0xFFFFFEFF) Restart Type N (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units boolean Default false Range true, false Restart Type N (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units enumeration Default QUEUE Note 4156