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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-limitations-database-objects.html
Each BLOB or TEXT column contributes 256 + 8 = 264 bytes to this total; this includes JSON columns. Some database objects such as tables and indexes have different limitations when using the NDBCLUSTER storage engine: Database and table names. When ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-mgm-client-commands.html
This command is used after adding new data nodes online to an NDB Cluster, and causes them to join a new node group and thus to begin participating fully in the cluster. In addition to the central configuration file, a cluster may also be ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-cluster-transactions.html
The cluster_transactions table shows information about all ongoing transactions in an NDB Cluster. (Currently, the MySQL Server does not expose the NDB API transaction ID of an ongoing transaction.) block_instance refers to an instance of a kernel ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-counters.html
See text for names of individual counters and the NDB kernel block with which each counter is associated. The counters table provides running totals of events such as reads and writes for specific kernel blocks and data nodes. Counts are kept from ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-locks-per-fragment.html
This table also shows the total time spent waiting for locks successfully and unsuccessfully since fragment or table creation, or since the most recent restart. fq_name is a fully qualified database object name in database/schema/name format, such ... The locks_per_fragment table provides information about counts of lock claim requests, and the outcomes of these requests on a per-fragment basis, serving as a companion table to operations_per_fragment and ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-nodes.html
status Current status of the data node; see text for possible values. This table contains information on the status of data nodes. For each data node that is running in the cluster, a corresponding row in this table provides the node's node ID, ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-resources.html
This table provides information about data node resource availability and usage. The resources table contains the following columns: node_id The unique node ID of this data node. reserved The amount reserved for this resource, as a number of 32KB ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-server-transactions.html
The server_transactions table is subset of the cluster_transactions table, but includes only those transactions in which the current SQL node (MySQL Server) is a participant, while including the relevant connection IDs. Together with the block ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-transporters.html
This information is shown in the table's status column, which can have any one of the following values: CONNECTING, CONNECTED, DISCONNECTING, or DISCONNECTED. Connections to API and management nodes which are configured but not currently connected ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-operations.html
Columns to be added online cannot use the BLOB or TEXT type, and must meet the following criteria: The columns must be dynamic; that is, it must be possible to create them using COLUMN_FORMAT DYNAMIC. MySQL NDB Cluster 7.5 and 7.6 support online ...