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https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-being-deleted-table.html
When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are removed from the INNODB_FT_DELETED table. Because the contents of INNODB_FT_BEING_DELETED typically have a short lifetime, this table has limited utility ... The INNODB_FT_BEING_DELETED table provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-default-stopword-table.html
For information about the default InnoDB stopword list and how to define your own stopword lists, see Section 14.9.4, “Full-Text Stopwords”. For related usage information and examples, see Section 17.15.4, “InnoDB INFORMATION_SCHEMA FULLTEXT ... The INNODB_FT_DEFAULT_STOPWORD table holds a list of stopwords that are used by default when creating a FULLTEXT index on InnoDB ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-deleted-table.html
For related usage information and examples, see Section 17.15.4, “InnoDB INFORMATION_SCHEMA FULLTEXT Index Tables”. Use the INFORMATION_SCHEMA COLUMNS table or the SHOW COLUMNS statement to view additional information about the columns of this ... The INNODB_FT_DELETED table stores rows that are deleted from the FULLTEXT index for an InnoDB ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-temp-table-info-table.html
The INNODB_TEMP_TABLE_INFO table is created when first queried, exists only in memory, and is not persisted to disk. For usage information and examples, see Section 17.15.7, “InnoDB INFORMATION_SCHEMA Temporary Table Info Table”. The number ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-keywords-table.html
The KEYWORDS table lists the words considered keywords by MySQL and, for each one, indicates whether it is reserved. Reserved keywords may require special treatment in some contexts, such as special quoting when used as identifiers (see Section ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-ndb-transid-mysql-connection-map-table.html
The ndb_transid_mysql_connection_map table provides a mapping between NDB transactions, NDB transaction coordinators, and MySQL Servers attached to an NDB Cluster as API nodes. This information is used when populating the server_operations and ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-optimizer-trace-table.html
MISSING_BYTES_BEYOND_MAX_MEM_SIZE Each remembered trace is a string that is extended as optimization progresses and appends data to it. If this limit is reached, the current trace is not extended (and thus is incomplete), and the ... The ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-disk-io.html
InnoDB uses asynchronous disk I/O where possible, by creating a number of threads to handle I/O operations, while permitting other database operations to proceed while the I/O is still in progress. On Linux and Windows platforms, InnoDB uses the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-tables.html
For related information and examples, see Section 17.15, “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 ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-monitor-types.html
There are two types of InnoDB monitor: The standard InnoDB Monitor displays the following types of information: Work done by the main background thread Semaphore waits Data about the most recent foreign key and deadlock errors Lock waits for ...