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https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-session-temp-tablespaces-table.html
The INNODB_SESSION_TEMP_TABLESPACES table provides metadata about session temporary tablespaces used for internal and user-created temporary tables. The INNODB_SESSION_TEMP_TABLESPACES table has these columns: ID The process or session ID. Use the ...Session temporary tablespaces are recreated each time the server is ...A ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-purge-configuration.html
Consequently, the InnoDB multi-version concurrency control (MVCC) system must keep a copy of the data in the undo log until all transactions that depend on that data have completed. InnoDB does not physically remove a row from the database ...A row ...This removal operation, which only occurs after the row is no longer required for multi-version concurrency control (MVCC) or rollback, is called a ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-transaction-isolation-levels.html
If the row matches (must be updated), MySQL reads the row again and this time InnoDB either locks it or waits for a lock on it. Transaction isolation is one of the foundations of database processing. InnoDB offers all four transaction isolation ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-deleted-table.html
Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that contains the FULLTEXT index (for example, test/articles). This value is used when you perform text searches, to ... The INNODB_FT_DELETED table stores rows that are deleted from the FULLTEXT index for an InnoDB ...For related usage ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-redo-log-buffer.html
The log buffer is the memory area that holds data to be written to the log files on disk. A large log buffer enables large transactions to run without the need to write redo log data to disk before the transactions commit. The ...The contents of ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-metrics-table.html
The INNODB_METRICS table provides a wide variety of InnoDB performance information, complementing the specific focus areas of the Performance Schema tables for InnoDB. Each monitor represents a point within the InnoDB source code that is ...With ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-being-deleted-table.html
Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that contains the FULLTEXT index (for example, test/articles). This value is used when you perform text searches, to ... 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-columns-table.html
PRTYPE The InnoDB “precise type”, a binary value with bits representing MySQL data type, character set code, and nullability. The INNODB_COLUMNS table has these columns: TABLE_ID An identifier representing the table associated with the column; ...For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object ...1 = VARCHAR, 2 = CHAR, 3 = FIXBINARY, 4 = BINARY, 5 = BLOB, ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-linux-native-aio.html
InnoDB uses the asynchronous I/O subsystem (native AIO) on Linux to perform read-ahead and write requests for data file pages. This behavior is controlled by the innodb_use_native_aio configuration option, which applies to Linux systems only and is ...Using the asynchronous I/O subsystem on Linux requires the libaio ...When a request is completed, a background ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-multiple-buffer-pools.html
When the InnoDB buffer pool is large, many data requests can be satisfied by retrieving from memory. Multiple buffer pool instances are configured using the innodb_buffer_pool_instances configuration option, and you might also adjust the ... For ...