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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-processes.html
For management nodes and API nodes other than SQL nodes, the value of this column is NULL. This table contains information about NDB Cluster node processes; each node is represented by the row in the table. Only nodes that are connected to the ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-waiter.html
State node 1 STARTED State node 2 STARTED State node 3 STARTED State node 4 STARTED Waiting for cluster enter state STARTED Note If no connection string is specified, then ndb_waiter tries to connect to a management on localhost, and reports ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-quick.html
To familiarize you with the basics, we describe the simplest possible configuration for a functional NDB Cluster. After this, you should be able to design your desired setup from the information provided in the other relevant sections of this ...
21.7.9.1 NDB Cluster Replication: Automating Synchronization of the Replica to the Source Binary Log
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-auto-sync.html
It is possible to automate much of the process described in the previous section (see Section 21.7.9, “NDB Cluster Backups With NDB Cluster Replication”). The following Perl script reset-replica.pl serves as an example of how you can do this.
https://dev.mysql.com/doc/refman/5.7/en/mysql-command-options.html
<field name="column_name">NULL</field> The output when --xml is used with mysql matches that of mysqldump --xml. mysql supports the following options, which can be specified on the command line or in the [mysql] and [client] groups of an option ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-tips.html
Connection id: 1 Current database: test Query OK, 1 row affected (1.30 sec) mysql> SELECT * FROM t; +------+ | a | +------+ | NULL | +------+ 1 row in set (0.05 sec) The @a user variable has been lost with the connection, and after the reconnection ... This section provides information about techniques for more effective use of mysql and about mysql operational ...
https://dev.mysql.com/doc/refman/5.7/en/mysqlslap.html
mysqlslap --delimiter=";" --number-of-queries=10 --query="use test;insert into t values(null)" --only-print Command-Line Format --only-print Type Boolean Default Value FALSE Do not connect to databases. mysqlslap is a diagnostic program designed to ...
https://dev.mysql.com/doc/refman/5.7/en/optimizing-subqueries.html
Development is ongoing, so no optimization tip is reliable for the long term. The following list provides some interesting tricks that you might want to play with. See also Section 8.2.2, “Optimizing Subqueries, Derived Tables, and View ...
https://dev.mysql.com/doc/refman/5.7/en/pam-pluggable-authentication.html
Note PAM pluggable authentication is an extension included in MySQL Enterprise Edition, a commercial product. MySQL Enterprise Edition supports an authentication method that enables MySQL Server to use PAM (Pluggable Authentication Modules) to ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-connection-tables.html
The Performance Schema also counts internal threads and threads for user sessions that failed to authenticate, using rows with USER and HOST column values of NULL. When a client connects to the MySQL server, it does so under a particular user name ...