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MySQL 8.0 Reference Manual  /  ...  /  Options, Variables, and Parameters Added, Deprecated or Removed in NDB 8.0

22.1.5 Options, Variables, and Parameters Added, Deprecated or Removed in NDB 8.0

The next few sections contain information about NDB configuration parameters and NDB-specific mysqld options and variables that have been added to, deprecated in, or removed from NDB 8.0.

Node Configuration Parameters Introduced in NDB 8.0

The following node configuration parameters have been added in NDB 8.0.

  • DiskDataUsingSameDisk: Set to false if Disk Data tablespaces are located on separate physical disks. Added in NDB 8.0.19.

  • MaxDiskDataLatency: Maximum allowed mean latency of disk access (ms) before starting to abort transactions. Added in NDB 8.0.19.

  • ReservedConcurrentIndexOperations: Number of simultaneous index operations having dedicated resources on one data node. Added in NDB 8.0.16.

  • ReservedConcurrentOperations: Number of simultaneous operations having dedicated resources in transaction coordinators on one data node. Added in NDB 8.0.16.

  • ReservedConcurrentScans: Number of simultaneous scans having dedicated resources on one data node. Added in NDB 8.0.16.

  • ReservedConcurrentTransactions: Number of simultaneous transactions having dedicated resources on one data node. Added in NDB 8.0.16.

  • ReservedFiredTriggers: Number of triggers having dedicated resources on one data node. Added in NDB 8.0.16.

  • ReservedLocalScans: Number of simultaneous fragment scans having dedicated resources on one data node. Added in NDB 8.0.16.

  • ReservedTransactionBufferMemory: Dynamic buffer space (in bytes) for key and attribute data allocated to each data node. Added in NDB 8.0.16.

  • TransactionMemory: Memory allocated for transactions on each data node. Added in NDB 8.0.19.

Node Configuration Parameters Deprecated in NDB 8.0

The following node configuration parameters have been deprecated in NDB 8.0.

  • BatchSizePerLocalScan: Used to calculate number of lock records for scan with hold lock. Deprecated as of NDB 8.0.19.

  • MaxNoOfConcurrentIndexOperations: Total number of index operations that can execute simultaneously on one data node. Deprecated as of NDB 8.0.19.

  • MaxNoOfConcurrentOperations: Maximum number of operation records in transaction coordinator. Deprecated as of NDB 8.0.19.

  • MaxNoOfConcurrentScans: Maximum number of scans executing concurrently on data node. Deprecated as of NDB 8.0.19.

  • MaxNoOfConcurrentTransactions: Maximum number of transactions executing concurrently on this data node, total number of transactions that can be executed concurrently is this value times number of data nodes in cluster. Deprecated as of NDB 8.0.19.

  • MaxNoOfFiredTriggers: Total number of triggers that can fire simultaneously on one data node. Deprecated as of NDB 8.0.19.

  • MaxNoOfLocalOperations: Maximum number of operation records defined on this data node. Deprecated as of NDB 8.0.19.

  • MaxNoOfLocalScans: Maximum number of fragment scans in parallel on this data node. Deprecated as of NDB 8.0.19.

  • ReservedTransactionBufferMemory: Dynamic buffer space (in bytes) for key and attribute data allocated to each data node. Deprecated as of NDB 8.0.19.

Node Configuration Parameters Removed in NDB 8.0

No node configuration parameters have been removed from NDB 8.0.

MySQL Server Options and Variables Introduced in NDB 8.0

The following mysqld system variables, status variables, and options have been added in NDB 8.0.

MySQL Server Options and Variables Deprecated in NDB 8.0

No system variables, status variables, or options have been deprecated in NDB 8.0.

MySQL Server Options and Variables Removed in NDB 8.0

No system variables, status variables, or options have been removed from NDB 8.0.