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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-add-node-example.html
Note StartNoNodegroupTimeout must be the same for all data nodes in the cluster; for this reason, you should always set it in the [ndbd default] section of the config.ini file, rather than for individual data nodes. In this section we provide a ...
https://dev.mysql.com/doc/refman/5.7/en/myisamlog.html
If a recovery is done (-r), all writes and possibly updates and deletes are done and errors are only counted. This option can be given multiple times to produce more and more output. To create such a file, start the server with a --log-isam=log_file ...
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-setup-show-enabled.html
Displays all currently enabled Performance Schema configuration. Parameters in_show_instruments BOOLEAN: Whether to display enabled instruments. This might be a long list. in_show_threads BOOLEAN: Whether to display enabled threads. Example mysql> ...
https://dev.mysql.com/doc/refman/5.7/en/internal-locking.html
Deadlocks affect performance rather than representing a serious error, because InnoDB automatically detects deadlock conditions and rolls back one of the affected transactions. At times, it may be more efficient to disable deadlock detection and ...
https://dev.mysql.com/doc/refman/5.7/en/other-vendor-data-types.html
To facilitate the use of code written for SQL implementations from other vendors, MySQL maps data types as shown in the following table. These mappings make it easier to import table definitions from other database systems into MySQL. If you create ...
https://dev.mysql.com/doc/refman/5.7/en/optimization.html
Sometimes you can be proactive and plan in advance for performance, while other times you might troubleshoot a configuration or code issue after a problem occurs. This chapter explains how to optimize MySQL performance and provides examples.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-session-account-connect-attrs-table.html
Application programs can provide key-value connection attributes to be passed to the server at connect time. For descriptions of common attributes, see Section 25.12.9, “Performance Schema Connection Attribute Tables”. The ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-session-connect-attrs-table.html
Application programs can provide key-value connection attributes to be passed to the server at connect time. For descriptions of common attributes, see Section 25.12.9, “Performance Schema Connection Attribute Tables”. To see connection ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-setup-consumers-table.html
If you disable a consumer, the server does not spend time adding event information to it. For detailed information about the effect of enabling different consumers, see Section 25.4.7, “Pre-Filtering by Consumer”.
https://dev.mysql.com/doc/refman/5.7/en/sys-ps-thread-stack.html
row *************************** thread_stack: {"rankdir": "LR","nodesep": "0.10", "stack_created": "2014-02-19 13:39:03", "mysql_version": "5.7.3-m13", "mysql_user": "root@localhost","events": [{"nesting_event_id": "0", "event_id": "10", ... Returns ...