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https://dev.mysql.com/doc/mysql-monitor/8.0/en/performance-advisors-ref.html
Also, tables that have TEXT or BLOB columns are automatically placed on disk. Stalled statements generate a lot of extra overhead since they involve extra context switches and in some cases even extra thread creations. For optimal performance, ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-genai-quickstart.html
It analyzes the characteristics of the data and creates an optimized machine learning model that can be used to generate predictions and explanations. To monitor MySQL HeatWave AutoML status, you can query the rapid_ml_status variable or the ...
https://dev.mysql.com/doc/heatwave/en/mys-hw-unload-tables.html
INFORMATION_SCHEMA.PARTITIONS includes a SECONDARY_LOAD column that indicates whether a partition is loaded. What's Next Learn more about the following: Accelerate Query Processing Train and Use Machine Learning Models Perform AI-Powered Search and ...Before You Begin Load structured data using Lakehouse Auto Parallel Load or ...
https://dev.mysql.com/doc/relnotes/heatwave/en/news-8-0-33.html
MySQL HeatWave AutoML Functionality Added or Changed MySQL HeatWave AutoML MySQL HeatWave AutoML now supports a recommendation task, see Generate Recommendations. (WL #15447) The following columns were added to the ...(WL #15416) Functionality ...
https://dev.mysql.com/doc/refman/8.4/en/charset-applications.html
To create a database such that its tables use a given default character set and collation for data storage, use a CREATE DATABASE statement like this: CREATE DATABASE mydb CHARACTER SET latin1 COLLATE latin1_swedish_ci; Tables created in the ... For ...
https://dev.mysql.com/doc/refman/8.4/en/commit.html
A warning is generated when the WITH CONSISTENT SNAPSHOT clause is ignored. Because of this, SHOW PROCESSLIST displays Rolling back in the State column for the session, not only for explicit rollbacks performed with the ROLLBACK statement but also ...SET autocommit disables or enables the default autocommit mode for the current ...
https://dev.mysql.com/doc/refman/8.4/en/comparison-operators.html
For DATE and DATETIME columns that are declared as NOT NULL, you can find the special date '0000-00-00' by using a statement like this: SELECT * FROM tbl_name WHERE date_column IS NULL This is needed to get some ODBC applications to work because ...
https://dev.mysql.com/doc/refman/8.4/en/create-event.html
This event executes once—one hour following its creation—by running an SQL statement that increments the value of the myschema.mytable table's mycol column by 1. (However, a warning is generated in such cases.) The ON SCHEDULE clause determines ... CREATE [DEFINER = user] EVENT [IF NOT EXISTS] event_name ON SCHEDULE schedule [ON COMPLETION [NOT] PRESERVE] [ENABLE | DISABLE | DISABLE ON {REPLICA | SLAVE}] [COMMENT 'string'] DO event_body; schedule: { AT timestamp [+ INTERVAL interval] ...
https://dev.mysql.com/doc/refman/8.4/en/data-dictionary-file-removal.html
The Information Schema TABLES table's VERSION column reports a hardcoded value of 10, which is the last .frm file version used in MySQL 5.7. ddl_log.log file: The file contained records of metadata operations generated by data definition statements ... In previous MySQL releases, dictionary data was partially stored in metadata ...
https://dev.mysql.com/doc/refman/8.4/en/derived-table-optimization.html
Consider the following query: SELECT * FROM t1 JOIN (SELECT DISTINCT f1 FROM t2) AS derived_t2 ON t1.f1=derived_t2.f1; The optimizer constructs an index over column f1 from derived_t2 if doing so would enable use of ref access for the lowest cost ...