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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/storage-engine-setting.html
To convert a table from one storage engine to another, use an ALTER TABLE statement that indicates the new engine: ALTER TABLE t ENGINE = InnoDB; See Section 13.1.18, “CREATE TABLE Statement”, and Section 13.1.8, “ALTER TABLE Statement”. By ... When you create a new table, you can specify which storage engine to use by adding an ENGINE table option to the CREATE TABLE statement: -- ENGINE=INNODB not needed unless you have set a different -- default storage ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-statistics-estimation.html
Optimizer statistics are not persisted to disk when innodb_stats_persistent=OFF or when individual tables are created or altered with STATS_PERSISTENT=0. Optimizer Statistics Updates Non-persistent optimizer statistics are updated when: Running ...
https://dev.mysql.com/doc/refman/5.7/en/federated-create.html
Alternatively, make a note of the table definition of an existing table, perhaps using the SHOW CREATE TABLE statement. To create a FEDERATED table you should follow these steps: Create the table on the remote server. Create the table on the local ...The optimization occurs because the query sent to the remote server includes the contents of the WHERE clause, and is sent to the remote server and subsequently executed ...
https://dev.mysql.com/doc/refman/5.7/en/identifier-qualifiers.html
For example, this statement creates a table using the unqualified name t1: CREATE TABLE t1 (i INT); Because t1 includes no qualifier to specify a database, the statement creates the table in the default database. This statement creates a table using ...An unqualified name is permitted in contexts where interpretation of the name is ...