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https://dev.mysql.com/doc/refman/8.4/en/mysqlbinlog-hexdump.html
Master ID: The server ID of the replication source server that created the event. For more information about binary log format, see MySQL Internals: The Binary Log. In the example shown, '9d fc 5c 43' is the representation of '051024 17:24:13' in ...
https://dev.mysql.com/doc/refman/8.4/en/obtaining-loadable-function-information.html
The Performance Schema user_defined_functions table contains information about the currently installed loadable functions: SELECT * FROM performance_schema.user_defined_functions; The mysql.func system table also lists installed loadable functions, ...This difference makes user_defined_functions preferable to mysql.func for checking which loadable functions are ...
https://dev.mysql.com/doc/refman/8.4/en/optimization-indexes.html
The best way to improve the performance of SELECT operations is to create indexes on one or more of the columns that are tested in the query. Although it can be tempting to create an indexes for every possible column used in a query, unnecessary ...
https://dev.mysql.com/doc/refman/8.4/en/optimizer-trace-implementation.html
A trace is started by creating an instance of Opt_trace_start; information is added to this trace by creating instances of Opt_trace_object and Opt_trace_array, and by using the add() methods of these classes.
https://dev.mysql.com/doc/refman/8.4/en/optimizing-myisam-bulk-data-loading.html
This creates the index tree in memory before writing it to disk, which is much faster than updating the index during LOAD DATA because it avoids lots of disk seeks. The main difference between automatic optimization and using the procedure ... These ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-spatial-analysis.html
It is also possible to create normal indexes on spatial columns. Other storage engines support non-SPATIAL indexes, as described in Section 15.1.15, “CREATE INDEX Statement”. For MyISAM and InnoDB tables, search operations in columns containing ...
https://dev.mysql.com/doc/refman/8.4/en/other-vendor-data-types.html
If you create a table with types used by other vendors and then issue a DESCRIBE tbl_name statement, MySQL reports the table structure using the equivalent MySQL types. To facilitate the use of code written for SQL implementations from other ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-limitations-functions.html
This section discusses limitations in MySQL Partitioning relating specifically to functions used in partitioning expressions. Each of these functions returns an integer only if it is passed an argument of an exact numeric type, such as one of the ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-tp-thread-group-state-table.html
This is where most threads end up when the thread group has created more threads than needed for normal operation. TIME_OF_LAST_THREAD_CREATION The point in time when the thread was last created. The tp_thread_group_state table has one row per ...
https://dev.mysql.com/doc/refman/8.4/en/point-in-time-recovery-positions.html
These are some sample steps to achieve that: Restore the last full backup created before the point-in-time of interest (call it tp, which is 20:06:00 on March 11, 2020 in our example). The last section, Section 9.5.1, “Point-in-Time Recovery ...