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https://dev.mysql.com/doc/refman/5.7/en/sys-innodb-lock-waits.html
These views summarize the InnoDB locks that transactions are waiting for. wait_age How long the lock has been waited for, as a TIME value. wait_age_secs How long the lock has been waited for, in seconds. For more information, see Identifying a ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-auto-increment-columns.html
This view indicates which tables have AUTO_INCREMENT columns and provides information about those columns, such as the current and maximum column values and the usage ratio (ratio of used to possible values). Tables in these schemas are excluded ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-progress-reporting.html
The following sys schema views provide progress reporting for long-running transactions: processlist session x$processlist x$session Assuming that the required instruments and consumers are enabled, the progress column of these views shows the ...
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-table-lock-waits.html
For additional information, see the description of the Performance Schema metadata_locks table at Section 25.12.12.1, “The metadata_locks Table”. waiting_thread_id The thread ID of the thread that is waiting for the lock. waiting_pid The ...
https://dev.mysql.com/doc/refman/5.7/en/sys-session-ssl-status.html
For each connection, this view displays the SSL version, cipher, and count of reused SSL sessions. The session_ssl_status view has these columns: thread_id The thread ID for the connection.
https://dev.mysql.com/doc/refman/5.7/en/thread-pool-elements.html
To identify them, use this query: SELECT * FROM performance_schema.setup_instruments WHERE NAME LIKE '%thread_pool%'; For more information, see Chapter 25, MySQL Performance Schema. MySQL Enterprise Thread Pool comprises these elements: A plugin ...
https://dev.mysql.com/doc/refman/5.7/en/optimization.html
This chapter explains how to optimize MySQL performance and provides examples. Depending on your job role (developer, DBA, or a combination of both), you might optimize at the level of individual SQL statements, entire applications, a single ...
https://dev.mysql.com/doc/refman/5.7/en/keyring-plugin-installation.html
Also, for general information about installing plugins, see Section 5.5.1, “Installing and Uninstalling Plugins”. keyring_encrypted_file: Stores keyring data in an encrypted, password-protected file local to the server host. keyring_okv: A KMIP ... Keyring service consumers require that a keyring plugin be ...
https://dev.mysql.com/doc/refman/5.7/en/examples.html
Some of the examples use the table shop to hold the price of each article (item number) for certain traders (dealers). Supposing that each trader has a single fixed price per article, then (article, dealer) is a primary key for the records. Here ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-tables.html
For related information and examples, see Section 14.16, “InnoDB INFORMATION_SCHEMA Tables”. INFORMATION_SCHEMA InnoDB tables can be used to monitor ongoing InnoDB activity, to detect inefficiencies before they turn into issues, or to ...