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https://dev.mysql.com/doc/refman/8.0/en/sys-host-summary-by-file-io.html
The host_summary_by_file_io and x$host_summary_by_file_io views have these columns: host The host from which the client connected. Rows for which the HOST column in the underlying Performance Schema table is NULL are assumed to be for background ...
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-file-io.html
The user_summary_by_file_io and x$user_summary_by_file_io views have these columns: user The client user name. Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are ...By ...
https://dev.mysql.com/doc/refman/8.0/en/show-triggers.html
This statement returns results only for databases and tables for which you have the TRIGGER privilege. The LIKE clause, if present, indicates which table names (not trigger names) to match and causes the statement to display triggers for those ...
https://dev.mysql.com/doc/refman/8.0/en/sys-io-by-thread-by-latency.html
These views summarize I/O consumers to display time waiting for I/O, grouped by thread. The io_by_thread_by_latency and x$io_by_thread_by_latency views have these columns: user For foreground threads, the account associated with the thread.
https://dev.mysql.com/doc/refman/8.0/en/sys-io-global-by-file-by-latency.html
These views summarize global I/O consumers to display time waiting for I/O, grouped by file. The io_global_by_file_by_latency and x$io_global_by_file_by_latency views have these columns: file The file path name. total_latency The total wait time of ...count_read The total number of read I/O events for the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-nodes.html
For each data node that is running in the cluster, a corresponding row in this table provides the node's node ID, status, and uptime. Notes The uptime column shows the time in seconds that this node has been running since it was last started or ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-rwlock-instances-table.html
An rwlock is a synchronization mechanism used in the code to enforce that threads at a given time can have access to some common resource following certain rules. The access is either shared (many threads can have a read lock at the same time), ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-backup-recovery.html
For information about point-in-time recovery, recovery from disk failure or corruption, and how InnoDB performs crash recovery, see Section 17.18.2, “InnoDB Recovery”. This section covers topics related to InnoDB backup and recovery. For ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-restrictions-limitations.html
This section describes restrictions and limitations of the InnoDB storage engine. You cannot create a table with a column name that matches the name of an internal InnoDB column (including DB_ROW_ID, DB_TRX_ID, and DB_ROLL_PTR. InnoDB does not keep ...This restriction applies to use of the names in any ...
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-options-variables.html
If configuration values specified at startup time are incorrect, X Plugin could fail to initialize properly and the server does not load it. This section describes the command options and system variables that configure X Plugin, as well as the ...