content_image/794625.jpg content_image/794624.jpg content_image/794622.jpg
Restart Type 

N (NDB 8.0.13) 

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” . 

• HeartbeatIntervalMgmdMgmd 

<img src='content_image/794625.jpg'>

Specify the interval between heartbeat messages used to determine whether another management node is on contact with this one. The management node waits after 3 of these intervals to declare the connection dead; thus, the default setting of 1500 milliseconds causes the management node to wait for approximately 1600 ms before timing out. 

<img src='content_image/794624.jpg'>

## Note 

After making changes in a management node’s configuration, it is necessary to perform a rolling restart of the cluster for the new configuration to take effect. 

To add new management servers to a running NDB Cluster, it is also necessary to perform a rolling restart of all cluster nodes after modifying any existing config.ini  files. For more information about issues arising when using multiple management nodes, see Section 23.1.7.10, “Limitations Relating to Multiple NDB Cluster Nodes” . 

Restart types.  Information about the restart types used by the parameter descriptions in this section is shown in the following table: 

<img src='content_image/794622.jpg'>

## 23.3.3.6 Defining NDB Cluster Data Nodes 

