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https://dev.mysql.com/doc/refman/9.7/en/innodb-information-schema-examples-compression-sect.html
This is because small memory allocation requests are fulfilled by splitting bigger blocks, starting from the 16K blocks that are allocated from the main buffer pool, using the buddy allocation system. Example 17.1 Using the Compression Information ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-information-schema-innodb_cmpmem.html
Internal Details InnoDB uses a buddy allocator system to manage memory allocated to pages of various sizes, from 1KB to 16KB. The INNODB_CMPMEM and INNODB_CMPMEM_RESET tables provide status information about compressed pages that reside in the ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-information-schema-internal-data.html
The underlying data is internal system-managed data, and can change very quickly: Data might not be consistent between the INNODB_TRX, data_locks, and data_lock_waits tables. The data exposed by the transaction and locking tables ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-locking-transaction-model.html
To implement a large-scale, busy, or highly reliable database application, to port substantial code from a different database system, or to tune MySQL performance, it is important to understand InnoDB locking and the InnoDB transaction model. This ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-online-ddl-failure-conditions.html
The tmpdir or innodb_tmpdir file system runs out of disk space, while MySQL writes temporary sort files on disk during index creation. The failure of an online DDL operation is typically due to one of the following conditions: An ALGORITHM clause ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-performance-schema.html
DBAs can also use this feature for capacity planning, to see whether their typical workload encounters any performance bottlenecks with a particular combination of CPU, RAM, and disk storage; and if so, to judge whether performance can be improved ... This section provides a brief introduction to InnoDB integration with Performance ...
https://dev.mysql.com/doc/refman/9.7/en/installation-layouts.html
The installation layout differs for different installation types (for example, native packages, binary tarballs, and source tarballs), which can lead to confusion when managing different systems or using different installation sources. The ...
https://dev.mysql.com/doc/refman/9.7/en/jdv-examples.html
The system deduces values for unprojected columns, or even missing keys in the document, based on the sub-object's JOIN condition. To demonstrate the different DML operations you can execute on JSON duality views, create the customers and orders ...
https://dev.mysql.com/doc/refman/9.7/en/json-duality-views-updatable.html
DML enables seamless INSERT, UPDATE, and DELETE operations directly in developer-friendly JSON documents while ensuring data consistency through the underlying relational schema. DML operations on JSON duality views involves several orchestrated ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-disk-data.html
For more information, see the following: Disk Data file system parameters. NDB Cluster supports storing nonindexed columns of NDB tables on disk, rather than in RAM. Column data and logging metadata are kept in data files and undo log files, ...