NDB Cluster Configuration Files Restart Type N (NDB 8.0.13) When more than this many unsent bytes are in the send buffer, the connection is considered overloaded. See Section 23.3.3.14, “Configuring NDB Cluster Send Buffer Parameters” , and Section 23.5.14.55, “The ndbinfo transporters Table” , for more information. If this parameter and  Checksum  are both enabled, perform pre-send checksum checks, and check all SHM signals between nodes for errors. Has no effect if  Checksum  is not also enabled. Size (in bytes) of the shared memory buffer for signals sent from this node using a shared memory connection. To retrace the path of a distributed message, it is necessary to provide each message with a unique identifier. Setting this parameter to  Y  causes these message IDs to be transported over the network as well. This feature is disabled by default in production builds, and enabled in  -debug  builds. • PreSendChecksum • SendBufferMemory • SendSignalId • ShmKey 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 integer Default 2M 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 unsigned Default 0 Range 0 - 4294967039 (0xFFFFFEFF) 4230