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https://dev.mysql.com/doc/refman/9.7/en/option-tracker-component-tables.html
This table, like other Performance Schema tables, is read-only, and thus cannot be updated or truncated by users. See Section 29.12.22.7, “The mysql_option Table”, for more detailed information about this table, such as columns and their ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-limitations.html
This section discusses current restrictions and limitations on MySQL partitioning support. The following constructs are not permitted in partitioning expressions: Stored procedures, stored functions, loadable functions, or plugins. For a list of ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-subpartitions.html
Subpartitioning—also known as composite partitioning—is the further division of each partition in a partitioned table. Consider the following CREATE TABLE statement: CREATE TABLE ts (id INT, purchased DATE) PARTITION BY RANGE( YEAR(purchased) ) ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-clone-progress-table.html
The clone_progress table shows progress information for the current or last executed cloning operation only. The stages of a cloning operation include DROP DATA, FILE COPY, PAGE_COPY, REDO_COPY, FILE_SYNC, RESTART, and RECOVERY. The table therefore ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-clone-status-table.html
The clone_status table shows the status of the current or last executed cloning operation only. The table only ever contains one row of data, or is empty. The clone_status table has these columns: ID A unique cloning operation identifier in the ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-events-stages-current-table.html
The table stores one row per thread showing the current status of the thread's most recent monitored stage event, so there is no system variable for configuring the table size. Of the tables that contain stage event rows, events_stages_current is ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-events-transactions-current-table.html
The table stores one row per thread showing the current status of the thread's most recent monitored transaction event, so there is no system variable for configuring the table size. For example: mysql> SELECT * FROM ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-log-status-table.html
The log_status table provides information that enables an online backup tool to copy the required log files without locking those resources for the duration of the copy process. When the log_status table is queried, the server blocks logging and ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-mutex-instances-table.html
The mutex_instances table lists all the mutexes seen by the Performance Schema while the server executes. A mutex is a synchronization mechanism used in the code to enforce that only one thread at a given time can have access to some common ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-ndb-replication-applier-status-table.html
NDBCLUSTER exposes its internal replication applier state for observation using global status variables such as Ndb_replica_max_replicated_epoch and Ndb_api_trans_start_count_replica, but these values reflect the state of the default replication ...