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MySQL 5.7 Reference Manual  /  ...  /  Options, Variables, and Parameters Added, Deprecated, or Removed in NDB 7.6

21.1.5.2 Options, Variables, and Parameters Added, Deprecated, or Removed in NDB 7.6

This section contains information about NDB configuration parameters and mysqld options and variables that have been added to, deprecated in, or removed from NDB 7.6.

Node Configuration Parameters Introduced in NDB 7.6

The following node configuration parameters have been added in NDB 7.6.

  • EnablePartialLcp: Enable partial LCP (true); if this disabled (false), all LCPs write full checkpoints. Added in NDB 7.6.4.

  • EnableRedoControl: Enable adaptive checkpointing speed for controlling redo log usage Added in NDB 7.6.7.

  • InsertRecoveryWork: Percentage of RecoveryWork used for inserted rows; has no effect unless partial local checkpoints are in use. Added in NDB 7.6.5.

  • LocationDomainId: Assign this API node to a specific availability domain or zone. 0 (the default) leaves this unset. Added in NDB 7.6.4.

  • LocationDomainId: Assign this management node to a specific availability domain or zone. 0 (the default) leaves this unset. Added in NDB 7.6.4.

  • LocationDomainId: Assign this data node to a specific availability domain or zone. 0 (the default) leaves this unset. Added in NDB 7.6.4.

  • MaxFKBuildBatchSize: Maximum scan batch size to use for building foreign keys. Increasing this value may speed up builds of foreign keys but impacts ongoing traffic as well. Added in NDB 7.6.4.

  • MaxReorgBuildBatchSize: Maximum scan batch size to use for reorganization of table partitions. Increasing this value may speed up table partition reorganization but impacts ongoing traffic as well. Added in NDB 7.6.4.

  • MaxUIBuildBatchSize: Maximum scan batch size to use for building unique keys. Increasing this value may speed up builds of unique keys but impacts ongoing traffic as well. Added in NDB 7.6.4.

  • ODirectSyncFlag: O_DIRECT writes are treated as synchronized writes; ignored when ODirect is not enabled, InitFragmentLogFiles is set to SPARSE, or both. Added in NDB 7.6.4.

  • PreSendChecksum: If this parameter and Checksum are both enabled, perform pre-send checksum checks, and check all SHM signals between nodes for errors Added in NDB 7.6.6.

  • PreSendChecksum: If this parameter and Checksum are both enabled, perform pre-send checksum checks, and check all TCP signals between nodes for errors Added in NDB 7.6.6.

  • RecoveryWork: Percentage of storage overhead for LCP files: greater value means less work in normal operations, more work during recovery Added in NDB 7.6.4.

  • SendBufferMemory: Bytes in shared memory buffer for signals sent from this node Added in NDB 7.6.6.

  • ShmSpinTime: When receiving, number of microseconds to spin before sleeping Added in NDB 7.6.6.

  • UseShm: Use shared memory connections between nodes Added in NDB 7.6.6.

  • WatchDogImmediateKill: When true, threads are immediately killed whenever watchdog issues occur; used for testing and debugging Added in NDB 7.6.7.

Node Configuration Parameters Deprecated in NDB 7.6

The following node configuration parameters have been deprecated in NDB 7.6.

  • BackupDataBufferSize: Default size of databuffer for a backup (in bytes). Deprecated as of NDB 7.6.4.

  • BackupMaxWriteSize: Maximum size of file system writes made by backup (in bytes). Deprecated as of NDB 7.6.4.

  • BackupWriteSize: Default size of file system writes made by backup (in bytes). Deprecated as of NDB 7.6.4.

  • IndexMemory: Number of bytes on each data node allocated for storing indexes; subject to available system RAM and size of DataMemory.. Deprecated as of NDB 7.6.2.

Node Configuration Parameters Removed in NDB 7.6

No node configuration parameters have been removed from NDB 7.6.

MySQL Server Options and Variables Introduced in NDB 7.6

The following mysqld system variables, status variables, and options have been added in NDB 7.6.

  • Ndb_system_name: Configured cluster system name; empty if server not connected to NDB Added in NDB 7.6.2.

  • ndb-log-update-minimal: Log updates in a minimal format. Added in NDB 7.6.3.

  • ndb_row_checksum: When enabled, set row checksums; enabled by default Added in NDB 7.6.8.

MySQL Server Options and Variables Deprecated in NDB 7.6

No system variables, status variables, or options have been deprecated in NDB 7.6.

MySQL Server Options and Variables Removed in NDB 7.6

No system variables, status variables, or options have been removed from NDB 7.6.


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