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https://dev.mysql.com/doc/refman/9.7/en/monitor-mysql-memory-use.html
The following example demonstrates how to use Performance Schema and sys schema to monitor MySQL memory usage. Instruments can be enabled by updating the ENABLED column of the Performance Schema setup_instruments table. Memory instruments have ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-ndbinfo-locks-per-fragment.html
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 memory_per_fragment. This table also ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-programs-ndb-config.html
This tool extracts current configuration information for data nodes, SQL nodes, and API nodes from one of a number of sources: an NDB Cluster management node, or its config.ini or my.cnf file. By default, the management node is the source for the ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-programs-ndb-sign-keys.html
Management of TLS keys and certificates in implemented in NDB Cluster as the executable utility program ndb_sign_keys, which can normally be found in the MySQL bin directory. The program performs such functions as creating, signing, and retiring ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-programs-ndb-waiter.html
ndb_waiter repeatedly (each 100 milliseconds) prints out the status of all cluster data nodes until either the cluster reaches a given status or the --timeout limit is exceeded, then exits. By default, it waits for the cluster to achieve STARTED ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-replication-schema.html
ndb_apply_status Table ndb_binlog_index Table ndb_replication Table Replication in NDB Cluster makes use of a number of dedicated tables in the mysql database on each MySQL Server instance acting as an SQL node in both the cluster being replicated ...
https://dev.mysql.com/doc/refman/9.7/en/mysqladmin.html
You can use it to check the server's configuration and current status, to create and drop databases, and more. Invoke mysqladmin like this: mysqladmin [options] command [command-arg] [command [command-arg]] ... Some of the commands take an argument ...
https://dev.mysql.com/doc/refman/9.7/en/mysqlcheck.html
The mysqlcheck client performs table maintenance: It checks, repairs, optimizes, or analyzes tables. Each table is locked and therefore unavailable to other sessions while it is being processed, although for check operations, the table is locked ...
https://dev.mysql.com/doc/refman/9.7/en/nested-loop-joins.html
MySQL executes joins between tables using a nested-loop algorithm or variations on it. Nested-Loop Join Algorithm Nested-Loop Join Algorithm A simple nested-loop join (NLJ) algorithm reads rows from the first table in a loop one at a time, passing ...
https://dev.mysql.com/doc/refman/9.7/en/optimize-table.html
OPTIMIZE TABLE reorganizes the physical storage of table data and associated index data, to reduce storage space and improve I/O efficiency when accessing the table. The exact changes made to each table depend on the storage engine used by that ...