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MySQL 5.5 Reference Manual :: 17 MySQL Cluster NDB 7.2 :: 17.1 MySQL Cluster Overview :: 17.1.6 Known Limitations of MySQL Cluster :: 17.1.6.5 Limits Associated with Database Objects in MySQL Cluster
17.1.6.6 Unsupported or Missing Features in MySQL Cluster »
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17.1.6.5. Limits Associated with Database Objects in MySQL Cluster

Some database objects such as tables and indexes have different limitations when using the NDBCLUSTER storage engine:

  • Number of database objects.  The maximum number of all NDB database objects in a single MySQL Cluster—including databases, tables, and indexes—is limited to 20320.

  • Attributes per table.  The maximum number of attributes (that is, columns and indexes) that can belong to a given table is 512.

  • Attributes per key.  The maximum number of attributes per key is 32.

  • Row size.  The maximum permitted size of any one row is 14000 bytes (as of MySQL Cluster NDB 7.0). Each BLOB or TEXT column contributes 256 + 8 = 264 bytes to this total.

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