MySQL 8.0 Reference Manual Including MySQL NDB Cluster 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.

  • 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.

Node Configuration Parameters Deprecated in NDB 8.0

No node configuration parameters have been deprecated in NDB 8.0.

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.

  • Ndb_metadata_detected_count: Number of times NDB metadata change monitor thread has detected changes. Added in NDB 8.0.16.

  • ndb-schema-dist-timeout: How long to wait before detecting timeout during schema distribution. Added in NDB 8.0.17.

  • ndb_metadata_check: Enable auto-detection of NDB metadata changes with respect to MySQL data dictionary; enabled by default. Added in NDB 8.0.16.

  • ndb_metadata_check_interval: Interval in seconds to perform check for NDB metadata changes with respect to MySQL data dictionary. Added in NDB 8.0.16.

  • ndbinfo: Enable ndbinfo plugin, if supported. Added in NDB 8.0.13.

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.