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https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-examples-compression-sect.html
The fragmentation is this low because some allocated blocks have been relocated (copied) to form bigger adjacent free blocks. Example 17.1 Using the Compression Information Schema Tables The following is sample output from a database that contains ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-examples.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-files-table.html
The Information Schema FILES table provides metadata about all InnoDB tablespace types including file-per-table tablespaces, general tablespaces, the system tablespace, temporary table tablespaces, and undo tablespaces (if present). For more ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-fulltext_index-tables.html
Because the contents of INNODB_FT_BEING_DELETED typically have a short lifetime, this table has limited utility for monitoring or debugging. INNODB_FT_BEING_DELETED: Provides a snapshot of the INNODB_FT_DELETED table; it is used only during an ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-innodb_cmp.html
These two tables have identical contents, but reading from INNODB_CMP_RESET resets the statistics on compression and uncompression operations. The INNODB_CMP and INNODB_CMP_RESET tables provide status information about operations related to ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-innodb_cmpmem.html
The INNODB_CMPMEM and INNODB_CMPMEM_RESET tables have identical contents, but reading from INNODB_CMPMEM_RESET resets the statistics on relocation operations. The INNODB_CMPMEM and INNODB_CMPMEM_RESET tables provide status information about ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-transactions.html
For any given blocked transaction, all rows in data_lock_waits have the same value for REQUESTING_ENGINE_LOCK_ID and different values for BLOCKING_ENGINE_LOCK_ID. Note This section describes locking information as exposed by the Performance Schema ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-understanding-innodb-locking.html
A transaction may have any number of lock requests for different rows or tables. Note This section describes locking information as exposed by the Performance Schema data_locks and data_lock_waits tables, which supersede the INFORMATION_SCHEMA ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-introduction.html
Unless you have configured a different default storage engine, issuing a CREATE TABLE statement without an ENGINE clause creates an InnoDB table. InnoDB is a general-purpose storage engine that balances high reliability and high performance. Key ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-linux-native-aio.html
The increase in parallel processing when using native AIO means that the type of I/O scheduler or properties of the disk array controller have a greater influence on I/O performance. InnoDB uses the asynchronous I/O subsystem (native AIO) on Linux ...