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https://dev.mysql.com/doc/refman/8.0/en/information-schema-optimizer-trace-table.html
The OPTIMIZER_TRACE table provides information produced by the optimizer tracing capability for traced statements. The OPTIMIZER_TRACE table has these columns: QUERY The text of the traced statement. MISSING_BYTES_BEYOND_MAX_MEM_SIZE Each ...
https://dev.mysql.com/doc/refman/8.0/en/multiple-column-indexes.html
For certain data types, you can index a prefix of the column (see Section 10.3.5, “Column Indexes”). MySQL can use multiple-column indexes for queries that test all the columns in the index, or queries that test just the first column, the first ... MySQL can create composite indexes (that is, indexes on multiple ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-interconnects.html
Even before design of NDBCLUSTER began in 1996, it was evident that one of the major problems to be encountered in building parallel databases would be communication between the nodes in the network. For this reason, NDBCLUSTER was designed from ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-arbitrator-validity-detail.html
The arbitrator_validity_detail table shows the view that each data node in the cluster has of the arbitrator. All nodes should show the same arbitrator and arb_ticket values as well as the same arb_state value. arb_connected shows whether the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-blobs.html
The part and (NDB 8.0.30 and later) inline sizes of NDB blob columns can be set using CREATE TABLE and ALTER TABLE statements containing NDB table column comments (see NDB_COLUMN Options); this can also be done in NDB API applications (see ...Parts ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cluster-operations.html
The cluster_operations table provides a per-operation (stateful primary key op) view of all activity in the NDB Cluster from the point of view of the local data management (LQH) blocks (see The DBLQH Block). (Currently, the MySQL Server does not ...
https://dev.mysql.com/doc/refman/8.0/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/8.0/en/mysql-cluster-ndbinfo-config-params.html
The config_params table is a static table which provides the names and internal ID numbers of and other information about NDB Cluster configuration parameters. This table can also be used in conjunction with the config_values table for obtaining ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpudata-1sec.html
The cpudata_1sec table provides data about CPU usage per second over the last 20 seconds.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cpudata-20sec.html
The cpudata_20sec table provides data about CPU usage per 20-second interval over the last 400 seconds.