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https://dev.mysql.com/doc/internals/en/caching.html
Uses hashing and reverse linked lists for quick caching of the most recently used blocks and quick flushing of changed entries for a specific table. (mysys/mf_keycash.c) Record Cache This is used for quick scanning of all records in a table. (Note ...
https://dev.mysql.com/doc/mysql-installer/en/mysql-installer-catalog-dashboard.html
For upgrades, a check box enables you to skip the upgrade check and process for system tables, while checking and processing data dictionary tables normally. If you stop and then restart the server without the --upgrade=MINIMAL option, the server ...
https://dev.mysql.com/doc/ndbapi/en/ndb-ndbindexscanoperation.html
Members Member names, types, and descriptions are shown in the following table: Table 2.47 IndexBound structure member names, types, and descriptions Name Type Description low_key const char* Row containing lower bound for scan (or NULL for scan ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-ml-score.html
ML_SCORE Syntax mysql> CALL sys.ML_SCORE(table_name, target_column_name, model_handle, metric, score, [options]); options: { JSON_OBJECT("key","value"[,"key","value"] ...) "key","value": { ['threshold', 'N'] ['topk', 'N'] ['remove_seen', ...
https://dev.mysql.com/doc/refman/8.4/en/connection-control-plugin-installation.html
To verify plugin installation, examine the Information Schema PLUGINS table or use the SHOW PLUGINS statement (see Section 7.6.2, “Obtaining Server Plugin Information”). In particular, installing only the CONNECTION_CONTROL_FAILED_LOGIN_ATTEMPTS ... This section describes how to install the connection control plugins, CONNECTION_CONTROL and ...
https://dev.mysql.com/doc/refman/8.4/en/crashing.html
The preceding means that normally you should not get corrupted tables unless one of the following happens: The MySQL server or the server host was killed in the middle of an update. Some external program is manipulating data files or index files at ... Each MySQL version is tested on many platforms before it is ...
https://dev.mysql.com/doc/refman/8.4/en/extended-show.html
Some extensions to SHOW statements accompany the implementation of INFORMATION_SCHEMA: SHOW can be used to get information about the structure of INFORMATION_SCHEMA itself. Several SHOW statements accept a WHERE clause that provides more ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-information-schema-innodb_cmpmem.html
The INNODB_CMPMEM and INNODB_CMPMEM_RESET tables provide status information about compressed pages that reside in the buffer pool. Please consult Section 17.9, “InnoDB Table and Page Compression” for further information on compressed tables and ...Internal Details InnoDB uses a buddy allocator system to manage memory allocated to pages of various sizes, from 1KB to ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-preload-buffer-pool.html
For example, you can save the state of the buffer pool after reaching a stable throughput under a steady workload. Only tablespace IDs and page IDs necessary to locate the appropriate pages are saved to disk. By default, tablespace ID and page ID ...
https://dev.mysql.com/doc/refman/8.4/en/insert-optimization.html
The size of the table slows down the insertion of indexes by log N, assuming B-tree indexes. If you are adding data to a nonempty table, you can tune the bulk_insert_buffer_size variable to make data insertion even faster. When loading a table from ... To optimize insert speed, combine many small operations into a single large ...