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https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-buffer-page-table.html
The INNODB_BUFFER_PAGE table has these columns: POOL_ID The buffer pool ID. This column is applicable only to pages with a PAGE_TYPE value of INDEX. This column is applicable only to pages with a PAGE_TYPE value of INDEX. This column is applicable ... The INNODB_BUFFER_PAGE table provides information about each page in the InnoDB buffer ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-ft-config-table.html
The INNODB_FT_CONFIG table has these columns: KEY The name designating an item of metadata for an InnoDB table containing a FULLTEXT index. The values for this column might change, depending on the needs for performance tuning and debugging for ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-ft-index-table-table.html
The INNODB_FT_INDEX_TABLE table has these columns: WORD A word extracted from the text of the columns that are part of a FULLTEXT. This value might reflect the value of an ID column that you defined for the underlying table, or it can be a sequence ... The INNODB_FT_INDEX_TABLE table provides information about the inverted index used to process text searches against the FULLTEXT index of an InnoDB ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-sys-foreign-cols-table.html
The INNODB_SYS_FOREIGN_COLS table provides status information about the columns of InnoDB foreign keys, equivalent to the information from the SYS_FOREIGN_COLS table in the InnoDB data dictionary. The INNODB_SYS_FOREIGN_COLS table has these ...For ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-sys-tables-table.html
The INNODB_SYS_TABLES table has these columns: TABLE_ID An identifier for the InnoDB table. The number reported includes three hidden columns that are created by InnoDB (DB_ROW_ID, DB_TRX_ID, and DB_ROLL_PTR). Use the INFORMATION_SCHEMA COLUMNS ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-locking.html
For example, SELECT c1 FROM t WHERE c1 BETWEEN 10 and 20 FOR UPDATE; prevents other transactions from inserting a value of 15 into column t.c1, whether or not there was already any such value in the column, because the gaps between all existing ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html
This data may also be obtained from the TRX_CONCURRENCY_TICKETS column of the Information Schema INNODB_TRX table. The stopword table must be an InnoDB table, containing a single VARCHAR column named value. The stopword table must be an InnoDB ...
https://dev.mysql.com/doc/refman/5.7/en/memory-use.html
For each concurrent thread, a table structure, column structures for each column, and a buffer of size 3 * N are allocated (where N is the maximum row length, not counting BLOB columns). A BLOB column requires five to eight bytes plus the length of ... MySQL allocates buffers and caches to improve performance of database ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-limitations-unsupported.html
The NDB storage engine does not support indexes on virtual generated columns. As with other storage engines, you can create an index on a stored generated column, but you should bear in mind that NDB uses DataMemory for storage of the generated ...
https://dev.mysql.com/doc/refman/5.7/en/optimize-table.html
After doing substantial insert, update, or delete operations on columns that are part of a FULLTEXT index in an InnoDB table. After deleting a large part of a MyISAM or ARCHIVE table, or making many changes to a MyISAM or ARCHIVE table with ...