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https://dev.mysql.com/doc/refman/8.0/en/compressed-format.html
Compressed tables have the following characteristics: Compressed tables take very little disk space. The header for a row takes up one to three bytes depending on the biggest row in the table. Note While a compressed table is read only, and you ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-delete-all.html
In some cases, this can be much faster than DELETE or even TRUNCATE TABLE. Usage ndb_delete_all -c connection_string tbl_name -d db_name This deletes all rows from the table named tbl_name in the database named db_name. Options that can be used with ...--connect-retries Command-Line Format --connect-retries=# Type Integer Default Value 12 Minimum Value 0 Maximum Value 12 Number of times to retry connection before giving ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-index-columns.html
This table provides information about indexes on NDB tables. The columns of the index_columns table are listed here, along with brief descriptions: table_id Unique ID of the NDB table for which the index is defined Name of the database containing ...
https://dev.mysql.com/doc/refman/8.0/en/all-subqueries.html
The expression is TRUE if table t2 contains (-5,0,+5) because 10 is greater than all three values in t2. The expression is FALSE if table t2 contains (12,6,NULL,-100) because there is a single value 12 in table t2 that is greater than 10. The ...
https://dev.mysql.com/doc/refman/8.0/en/firewall-usage.html
Alternatively, MySQL Workbench 6.3.4 or higher provides a graphical interface for firewall control. Alternatively, to set and persist the firewall setting at runtime: SET PERSIST mysql_firewall_mode = OFF; SET PERSIST mysql_firewall_mode = ON; SET ... Before using MySQL Enterprise Firewall, install it according to the instructions provided in Section 8.4.7.2, “Installing or Uninstalling MySQL Enterprise ...
https://dev.mysql.com/doc/refman/8.0/en/fulltext-stopwords.html
To see the default InnoDB stopword list, query the Information Schema INNODB_FT_DEFAULT_STOPWORD table. The stopword table must have a single VARCHAR column named value. The following example demonstrates creating and configuring a new global ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-deadlocks-handling.html
When modifying multiple tables within a transaction, or different sets of rows in the same table, do those operations in a consistent order each time. Add well-chosen indexes to your tables so that your queries scan fewer index records and set fewer ... This section builds on the conceptual information about deadlocks in Section 17.7.5.2, “Deadlock ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-porting-memcached.html
If you store several different classes of information using memcached, consider setting up a separate InnoDB table for each type of data. Define additional table identifiers in the innodb_memcache.containers table, and use the @@table_id.key ...This ...
https://dev.mysql.com/doc/refman/8.0/en/mysqlslap.html
mysqlslap runs in three stages: Create schema, table, and optionally any stored programs or data to use for the test. --auto-generate-sql-add-autoincrement Command-Line Format --auto-generate-sql-add-autoincrement Type Boolean Default Value FALSE ...
https://dev.mysql.com/doc/refman/8.0/en/replication-options-gtids.html
Only statements that can be logged using GTID safe statements can be logged when enforce_gtid_consistency is set to ON, so the operations listed here cannot be used with this option: CREATE TEMPORARY TABLE or DROP TEMPORARY TABLE statements inside ... The MySQL Server system variables described in this section are used to monitor and control Global Transaction Identifiers ...