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https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-porting-memcached.html
You might create additional secondary indexes on tables that are frequently used to generate reports using SQL. If you store several different classes of information using memcached, consider setting up a separate InnoDB table for each type of data.
https://dev.mysql.com/doc/refman/8.0/en/condition-filtering.html
In join processing, prefix rows are those rows passed from one table in a join to the next. In general, the optimizer attempts to put tables with low prefix counts early in the join order to keep the number of row combinations from increasing ...
https://dev.mysql.com/doc/refman/8.0/en/intersect.html
query_expression_body INTERSECT [ALL | DISTINCT] query_expression_body [INTERSECT [ALL | DISTINCT] query_expression_body] [...] query_expression_body: See Section 15.2.14, “Set Operations with UNION, INTERSECT, and EXCEPT” INTERSECT limits the ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-consumer-configurations.html
The consumer settings in the setup_consumers table form a hierarchy from higher levels to lower. The setup_consumers table contains the following hierarchy of values: global_instrumentation thread_instrumentation events_waits_current ...The ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression.html
Using the compression features of InnoDB, you can create tables where the data is stored in compressed form. This section provides information about the InnoDB table compression and InnoDB page compression features. The benefits are amplified for ...The page compression feature is also referred to as transparent page ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-hash-maps.html
id The hash map's unique ID version Hash map version (integer) state Hash map state; see Object::State for values and descriptions.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-resources.html
This table provides information about data node resource availability and usage. The resources table contains the following columns: node_id The unique node ID of this data node. Notes The resource_name can be any one of the names shown in the ...
https://dev.mysql.com/doc/refman/8.0/en/faqs-stored-procs.html
Are stored procedures and functions created on a replication source server replicated to a replica? A.4.24. You can manage stored procedures with CREATE [FUNCTION|PROCEDURE], ALTER [FUNCTION|PROCEDURE], DROP [FUNCTION|PROCEDURE], and SHOW CREATE ...
https://dev.mysql.com/doc/refman/8.0/en/temporary-files.html
For some statements, MySQL creates temporary SQL tables that are not hidden and have names that begin with #sql. Some SELECT queries creates temporary SQL tables to hold intermediate results. DDL operations that rebuild the table and are not ...The ... On Unix, MySQL uses the value of the TMPDIR environment variable as the path name of the directory in which to store temporary ...
https://dev.mysql.com/doc/refman/8.0/en/mysqlimport.html
Here is a sample session that demonstrates use of mysqlimport: $> mysql -e 'CREATE TABLE imptest(id INT, n VARCHAR(30))' test $> ed a 100 Max Sydow 101 Count Dracula . Invoke mysqlimport like this: mysqlimport [options] db_name textfile1 [textfile2 ... The mysqlimport client provides a command-line interface to the LOAD DATA SQL ...