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https://dev.mysql.com/doc/refman/5.7/en/limit-optimization.html
In some cases, a GROUP BY can be resolved by reading the index in order (or doing a sort on the index), then calculating summaries until the index value changes. In this case, LIMIT row_count does not calculate any unnecessary GROUP BY values. If ...
https://dev.mysql.com/doc/refman/5.7/en/multiple-windows-services.html
In this case, you can use the [mysqld1] group for 5.7.9 and the [mysqld2] group for 5.7.44. In this case, each file should list options using a [mysqld] group. On Windows, a MySQL server can run as a Windows service. The procedures for installing, ...
https://dev.mysql.com/doc/refman/5.7/en/myisamchk.html
myisamchk supports the following options, which can be specified on the command line or in the [myisamchk] group of an option file. The myisamchk utility gets information about your database tables or checks, repairs, or optimizes them. myisamchk ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-basics.html
There are as many data nodes as there are fragment replicas, times the number of fragments (see Section 21.2.2, “NDB Cluster Nodes, Node Groups, Fragment Replicas, and Partitions”). For a brief introduction to the relationships between nodes, ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-limitations-exclusive-to-cluster.html
The following are limitations specific to the NDB storage engine: Machine architecture. All machines used in the cluster must have the same architecture. That is, all machines hosting nodes must be either big-endian or little-endian, and you cannot ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-limitations-syntax.html
The maximum number of partitions that can defined for a NDBCLUSTER table when employing user-defined partitioning is 8 per node group. (See Section 21.2.2, “NDB Cluster Nodes, Node Groups, Fragment Replicas, and Partitions”, for more information ... Some SQL statements relating to certain MySQL features produce errors when used with NDB tables, as described in the following list: Temporary ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-logs-cluster-log.html
The following table lists the most common NDB cluster log messages. For information about the cluster log, log events, and event types, see Section 21.6.3, “Event Reports Generated in NDB Cluster”. These log messages also correspond to log ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-membership.html
The membership table describes the view that each data node has of all the others in the cluster, including node group membership, president node, arbitrator, arbitrator successor, arbitrator connection states, and other information. We determine ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-error-reporter.html
--skip-nodegroup=nodegroup_id Command-Line Format --connection-timeout=# Type Integer Default Value 0 Skip all nodes belong to the node group having the supplied node group ID. ndb_error_reporter creates an archive from data node and management ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication.html
This section explains how to set up and manage a configuration in which one group of computers operating as an NDB Cluster replicates to a second computer or group of computers. Note NDB Cluster does not support replication using GTIDs; ... NDB ...