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https://dev.mysql.com/doc/refman/5.7/en/optimizing-myisam-bulk-data-loading.html
For a MyISAM table, you can use concurrent inserts to add rows at the same time that SELECT statements are running, if there are no deleted rows in middle of the data file. With some extra work, it is possible to make LOAD DATA run even faster for a ... These performance tips supplement the general guidelines for fast inserts in Section 8.2.4.1, “Optimizing INSERT ...
https://dev.mysql.com/doc/refman/5.7/en/sys-table-exists.html
Tests whether a given table exists as a regular table, a TEMPORARY table, or a view. If both a temporary and a permanent table exist with the given name, TEMPORARY is returned. Parameters in_db VARCHAR(64): The name of the database in which to ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-benefits.html
InnoDB tables have the following benefits: If the server unexpectedly exits because of a hardware or software issue, regardless of what was happening in the database at the time, you don't need to do anything special after restarting the database.
https://dev.mysql.com/doc/refman/5.7/en/myisam-maintenance-schedule.html
It is a good idea to perform table checks on a regular basis rather than waiting for problems to occur. One way to check and repair MyISAM tables is with the CHECK TABLE and REPAIR TABLE statements. It is also a good idea to enable automatic MyISAM ...The -s option (short for --silent) causes myisamchk to run in silent mode, printing messages only when errors ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-operations-per-fragment.html
The operations_per_fragment table provides information about the operations performed on individual fragments and fragment replicas, as well as about some of the results from these operations. This currently has the following formats: Base table: ...The syntax just shown for fully qualified object names is an internal interface which is subject to change in future ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-table-statistics.html
By default, rows are sorted by descending total wait time (tables with most contention first). The schema_table_statistics and x$schema_table_statistics views have these columns: table_schema The schema that contains the table. total_latency The ...
https://dev.mysql.com/doc/refman/5.7/en/federated-create.html
To create a FEDERATED table you should follow these steps: Create the table on the remote server. Alternatively, make a note of the table definition of an existing table, perhaps using the SHOW CREATE TABLE statement. 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/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 ...
https://dev.mysql.com/doc/refman/5.7/en/optimizing-innodb-bulk-data-loading.html
COMMIT; The mysqldump option --opt creates dump files that are fast to import into an InnoDB table, even without wrapping them with the SET autocommit and COMMIT statements. If you have UNIQUE constraints on secondary keys, you can speed up table ...