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https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-transactions.html
Note This section describes locking information as exposed by the Performance Schema data_locks and data_lock_waits tables, which supersede the INFORMATION_SCHEMA INNODB_LOCKS and INNODB_LOCK_WAITS tables in MySQL 8.0. For similar discussion ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-understanding-innodb-locking.html
Note This section describes locking information as exposed by the Performance Schema data_locks and data_lock_waits tables, which supersede the INFORMATION_SCHEMA INNODB_LOCKS and INNODB_LOCK_WAITS tables in MySQL 8.0. For similar discussion ...At ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-undo-logs.html
Rollback segments reside in undo tablespaces and in the global temporary tablespace. Undo logs that reside in the global temporary tablespace are used for transactions that modify data in user-defined temporary tables. Each undo tablespace and the ... An undo log is a collection of undo log records associated with a single read-write ...
https://dev.mysql.com/doc/refman/8.0/en/order-by-optimization.html
Whether the optimizer actually does so depends on whether reading the index is more efficient than a table scan if columns not in the index must also be read. In that case, scanning an entire index and looking up table rows to find columns not in ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-restrictions.html
If you save event information in another table, you should not assume that the original events remain available later. For example, if you select events from a performance_schema table into a temporary table, intending to join that table with the ...
https://dev.mysql.com/doc/refman/8.0/en/privilege-changes.html
If the mysqld server is started without the --skip-grant-tables option, it reads all grant table contents into memory during its startup sequence. The in-memory tables become effective for access control at that point. If you modify the grant ...
https://dev.mysql.com/doc/refman/8.0/en/thread-pool-installation.html
Thread Pool Installation as of MySQL 8.0.14 Thread Pool Installation Prior to MySQL 8.0.14 Thread Pool Installation as of MySQL 8.0.14 In MySQL 8.0.14 and higher, the thread pool monitoring tables are Performance Schema tables that are loaded and ...
https://dev.mysql.com/doc/refman/8.0/en/ibd2sdi.html
ibd2sdi is a utility for extracting serialized dictionary information (SDI) from InnoDB tablespace files. ibd2sdi can be run on file-per-table tablespace files (*.ibd files), general tablespace files (*.ibd files), system tablespace files (ibdata* ...ibd2sdi can be used at runtime or while the server is ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-files.html
The files table is empty if no disk data objects have been created in NDB. See Section 25.6.11.1, “NDB Cluster Disk Data Objects”, for more information.
https://dev.mysql.com/doc/refman/8.0/en/server-shutdown.html
Depending on how shutdown was initiated, the server might create a thread to handle the shutdown process. If shutdown was requested by a client, a shutdown thread is created. If shutdown is the result of receiving a SIGTERM signal, the signal thread ... The server shutdown process takes place as follows: The shutdown process is ...