NDB Cluster Configuration Files Controlling log messages.   In managing the cluster, it is very important to be able to control the number of log messages sent for various event types to  stdout . For each event category, there are 16 possible event levels (numbered 0 through 15). Setting event reporting for a given event category to level 15 means all event reports in that category are sent to  stdout ; setting it to 0 means that no event reports in that category are made. By default, only the startup message is sent to  stdout , with the remaining event reporting level defaults being set to 0. The reason for this is that these messages are also sent to the management server’s cluster log. An analogous set of levels can be set for the management client to determine which event levels to record in the cluster log. The reporting level for events generated during startup of the process. The default level is 1. The reporting level for events generated as part of graceful shutdown of a node. The default level is 0. The reporting level for statistical events such as number of primary key reads, number of updates, number of inserts, information relating to buffer usage, and so on. • LogLevelStatistic • LogLevelShutdown • LogLevelStartup 4116 Controls the size of the circular buffer used for NDB log events within data nodes. Restart Type S (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units integer Default 0 Range 0 - 15 Restart Type N (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units integer Default 0 Range 0 - 15 Restart Type N (NDB 8.0.13) Version (or later) NDB 8.0.13 Type or units integer Default 1 Range 0 - 15 Restart Type N (NDB 8.0.13)