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https://dev.mysql.com/doc/refman/8.0/en/option-files.html
Programs that do not understand the option quit after displaying an error message if you try to run them. Most MySQL programs can read startup options from option files (sometimes called configuration files). Option files provide a convenient way ...
https://dev.mysql.com/doc/refman/8.0/en/outer-join-optimization.html
MySQL implements an A LEFT JOIN B join_specification as follows: Table B is set to depend on table A and all tables on which A depends. Table A is set to depend on all tables (except B) that are used in the LEFT JOIN condition. The LEFT JOIN ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-hash.html
Partitioning by HASH is used primarily to ensure an even distribution of data among a predetermined number of partitions. To partition a table using HASH partitioning, it is necessary to append to the CREATE TABLE statement a PARTITION BY HASH ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-info.html
row *************************** id: 1 select_type: SIMPLE table: trb1 partitions: p0,p1 type: range possible_keys: PRIMARY key: PRIMARY key_len: 4 ref: NULL rows: 7 Extra: Using where If EXPLAIN is used to examine a query against a nonpartitioned ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-types.html
This section discusses the types of partitioning which are available in MySQL 8.0. This type of partitioning assigns rows to partitions based on column values falling within a given range. For information about an extension to this type, RANGE ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-functions.html
If the Performance Schema itself is disabled, PS_THREAD_ID() produces an error. As of MySQL 8.0.16, MySQL includes built-in SQL functions that format or retrieve Performance Schema data, and that may be used as equivalents for the corresponding sys ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-miscellaneous-tables.html
The following sections describe tables that do not fall into the table categories discussed in the preceding sections: component_scheduler_tasks: The current status of each scheduled task. user_defined_functions: Loadable functions registered by a ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-prepared-statements-instances-table.html
The Performance Schema provides instrumentation for prepared statements, for which there are two protocols: The binary protocol. This is accessed through the MySQL C API and maps onto underlying server commands as shown in the following table. C ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-statement-summary-tables.html
For example, the SUM_LOCK_TIME and SUM_ERRORS columns in statement summary tables are the aggregates of the LOCK_TIME and ERRORS columns in events_statements_current table. The Performance Schema maintains tables for collecting current and recent ...
https://dev.mysql.com/doc/refman/8.0/en/perl-support-problems.html
If you get the following errors from DBD::mysql, you are probably using gcc (or using an old binary compiled with gcc): /usr/bin/perl: can't resolve symbol '__moddi3' /usr/bin/perl: can't resolve symbol '__divdi3' Add -L/usr/lib/gcc-lib/... If Perl ...