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https://dev.mysql.com/doc/refman/5.7/en/known-issues.html
If you use ALTER TABLE to add a UNIQUE index to a table used in a MERGE table and then add a normal index on the MERGE table, the key order is different for the tables if there was an old, non-UNIQUE key in the table. This is because ALTER TABLE ...
https://dev.mysql.com/doc/refman/5.7/en/replication-gtids-lifecycle.html
A GTID is also assigned to the creation, alteration, or deletion of a database, and of a non-table database object such as a procedure, function, trigger, event, view, user, role, or grant. Whenever the binary log is rotated or the server is shut ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-cmp-table.html
The INNODB_CMP and INNODB_CMP_RESET tables provide status information on operations related to compressed InnoDB tables. The INNODB_CMP and INNODB_CMP_RESET tables have these columns: PAGE_SIZE The compressed page size in bytes. row ...COMPRESS_OPS ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-table-info.html
The table_info table provides information about logging, checkpointing, distribution, and storage options in effect for individual NDB tables.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-host-cache-table.html
The host_cache_size system variable controls the size of the host cache, as well as the size of the host_cache table. Because the host_cache table exposes the contents of the host cache, it can be examined using SELECT statements. The Performance ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-system-variable-tables.html
Note The value of the show_compatibility_56 system variable affects the information available from the tables described here. System variable information is available in these Performance Schema tables: global_variables: Global system variables. An ...For details, see the description of that variable in Section 5.1.7, “Server System ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-table-reference.html
The following table summarizes all available Performance Schema tables. For greater detail, see the individual table descriptions. Table 25.1 Performance Schema Tables Table Name Description Deprecated accounts Connection statistics per client ...
https://dev.mysql.com/doc/refman/5.7/en/repair-table-optimization.html
An alternative that avoids this problem is to use a separate key cache, assign to it the indexes from the table to be repaired, and deallocate it when the repair is complete. REPAIR TABLE for MyISAM tables is similar to using myisamchk for repair ...You may be able to its improve performance by setting these variables, as described in Section 4.6.3.6, “myisamchk Memory ...
https://dev.mysql.com/doc/refman/5.7/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/5.7/en/mysql-cluster-programs-ndb-drop-index.html
Usage ndb_drop_index -c connection_string table_name index -d db_name The statement shown above drops the index named index from the table in the database. Options that can be used with ndb_drop_index are shown in the following table. --database, -d ...It is recommended that you use this utility only as an example for writing NDB API applications—see the Warning later in this section for ...