Overview of NDB Cluster Configuration Parameters, Options, and Variables • RedoBuffer : Number of bytes on each data node allocated for writing redo logs. • RedoOverCommitCounter : When RedoOverCommitLimit has been exceeded this many times, transactions are aborted, and operations are handled as specified by DefaultOperationRedoProblemAction. • RedoOverCommitLimit : Each time that flushing current redo buffer takes longer than this many seconds, number of times that this has happened is compared to RedoOverCommitCounter. • ReservedConcurrentIndexOperations : Number of simultaneous index operations having dedicated resources on one data node. • ReservedConcurrentOperations : Number of simultaneous operations having dedicated resources in transaction coordinators on one data node. • ReservedConcurrentScans : Number of simultaneous scans having dedicated resources on one data node. • ReservedConcurrentTransactions : Number of simultaneous transactions having dedicated resources on one data node. • ReservedFiredTriggers : Number of triggers having dedicated resources on one data node. • ReservedLocalScans : Number of simultaneous fragment scans having dedicated resources on one data node. • ReservedTransactionBufferMemory : Dynamic buffer space (in bytes) for key and attribute data allocated to each data node. • RestartOnErrorInsert : Control type of restart caused by inserting error (when StopOnError is enabled). • SchedulerExecutionTimer : Number of microseconds to execute in scheduler before sending. • SchedulerResponsiveness : Set NDB scheduler response optimization 0-10; higher values provide better response time but lower throughput. • SchedulerSpinTimer : Number of microseconds to execute in scheduler before sleeping. • ServerPort : Port used to set up transporter for incoming connections from API nodes. • SharedGlobalMemory : Total number of bytes on each data node allocated for any use. • SpinMethod : Determines spin method used by data node; see documentation for details. • StartFailRetryDelay : Delay in seconds after start failure prior to retry; requires StopOnError = 0. • StartFailureTimeout : Milliseconds to wait before terminating. (0=Wait forever). • StartNoNodeGroupTimeout : Time to wait for nodes without nodegroup before trying to start (0=forever). • StartPartialTimeout : Milliseconds to wait before trying to start without all nodes. (0=Wait forever). • StartPartitionedTimeout : Milliseconds to wait before trying to start partitioned. (0=Wait forever). • StartupStatusReportFrequency : Frequency of status reports during startup. • StopOnError : When set to 0, data node automatically restarts and recovers following node failures. 4037