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https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-metrics-table.html
To start, stop, and reset counters, set one of the system variables innodb_monitor_enable, innodb_monitor_disable, innodb_monitor_reset, or innodb_monitor_reset_all, using the name of the counter, the name of the module, a wildcard match for such a ... The INNODB_METRICS table provides a wide variety of InnoDB performance information, complementing the specific focus areas of the Performance Schema tables for ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-performance-multiple_io_threads.html
You can set values for these parameters in the MySQL option file (my.cnf or my.ini); you cannot change values dynamically. These parameters signify the number of background threads used for read and write requests, respectively. The default value ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-backup-configuration.html
You can also set a location for the backup files using the BackupDataDir configuration parameter. Five configuration parameters are essential for backup: BackupDataBufferSize The amount of memory used to buffer data before it is written to disk. In ...
https://dev.mysql.com/doc/refman/5.7/en/optimize-character.html
For character and string columns, follow these guidelines: Use binary collation order for fast comparison and sort operations, when you do not need language-specific collation features. When comparing values from different columns, declare those ...
https://dev.mysql.com/doc/refman/5.7/en/perror.html
For most system errors, MySQL displays, in addition to an internal text message, the system error code in one of the following styles: message ... (Errcode: #) You can find out what the error code means by examining the documentation for your ...
https://dev.mysql.com/doc/refman/5.7/en/procedure-analyse.html
You may need to try different settings for the arguments so that PROCEDURE ANALYSE() does not suggest the ENUM data type when it is not appropriate. ANALYSE() examines the result from a query and returns an analysis of the results that suggests ...
https://dev.mysql.com/doc/refman/5.7/en/replication-features-variables.html
In addition, the enabling this variable has different effects with regard to temporary tables, table locking, and the SET PASSWORD statement in different MySQL versions. To help reduce possible confusion, we recommend that you always use the same ...
https://dev.mysql.com/doc/refman/5.7/en/show-collation.html
Default Whether the collation is the default for its character set. To see the default collation for each character set, use the following statement. Charset The name of the character set with which the collation is associated. Sortlen This is ...
https://dev.mysql.com/doc/refman/5.7/en/show-procedure-code.html
SHOW PROCEDURE CODE proc_name This statement is a MySQL extension that is available only for servers that have been built with debugging support. A similar statement, SHOW FUNCTION CODE, displays information about stored functions (see Section ...
https://dev.mysql.com/doc/refman/5.7/en/fulltext-search-ngram.html
Typically, ngram_token_size is set to the size of the largest token that you want to search for. If you only intend to search for single characters, set ngram_token_size to 1. If you need to search for words comprised of more than one character, set ...The ngram full-text parser is supported for use with InnoDB and ... The built-in MySQL full-text parser uses the white space between words as a delimiter to determine where words begin and end, which is a limitation ...