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https://dev.mysql.com/doc/refman/5.7/en/show-profile.html
Note The SHOW PROFILE and SHOW PROFILES statements are deprecated; expect them to be removed in a future MySQL release. Use the Performance Schema instead; see Section 25.19.1, “Query Profiling Using Performance Schema”. To control profiling, ...
https://dev.mysql.com/doc/refman/5.7/en/temporary-files.html
InnoDB non-compressed, user-created temporary tables and on-disk internal temporary tables are created in a temporary tablespace file named ibtmp1 in the MySQL data directory. For some statements, MySQL creates temporary SQL tables that are not ...
https://dev.mysql.com/doc/refman/5.7/en/using-systemd.html
This script assists in creating the error log file only if the log location matches a pattern (/var/log/mysql*.log for RPM platforms, /var/log/mysql/*.log for Debian platforms). In other cases, the error log directory must be writable or the error ...If you install MySQL from a source distribution on a platform that uses systemd, obtain systemd support for MySQL by configuring the distribution using the -DWITH_SYSTEMD=1 CMake ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-limitations-partitioning-keys-unique-keys.html
This section discusses the relationship of partitioning keys with primary keys and unique keys. The rule governing this relationship can be expressed as follows: All columns used in the partitioning expression for a partitioned table must be part ...
https://dev.mysql.com/doc/refman/5.7/en/replication-features-differing-tables.html
A column's default value is determined by a number of factors, including its type, whether it is defined with a DEFAULT option, whether it is declared as NULL, and the server SQL mode in effect at the time of its creation; for more information, see ... Source and target tables for replication do not have to be ...
https://dev.mysql.com/doc/refman/5.7/en/windows-symbolic-links.html
To do this, create a symbolic link in the MySQL data directory that points to D:\data\mydb. However, before creating the symbolic link, make sure that the D:\data\mydb directory exists by creating it if necessary. On Windows, you can create a ... On ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-internals.html
The cache_policies table, config_options table, and containers table are created by the innodb_memcached_config.sql configuration script in the innodb_memcache database. The containers table contains a default entry for the test.demo_test table, ...
https://dev.mysql.com/doc/refman/5.7/en/lock-tables.html
The table can be accessed freely by the session within which it was created, regardless of what other locking may be in effect. The following statements are prohibited while a LOCK TABLES statement is in effect: CREATE TABLE, CREATE TABLE ... LIKE, ... LOCK {TABLE | TABLES} tbl_name [[AS] alias] lock_type [, tbl_name [[AS] alias] lock_type] ...
https://dev.mysql.com/doc/refman/5.7/en/locking-service.html
The namespace enables different applications to use the same lock names without colliding by creating locks in separate namespaces. This is distinct from, for example, locks acquired with the GET_LOCK() function, which have an OBJECT_TYPE of USER ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-hash.html
To partition a table using HASH partitioning, it is necessary to append to the CREATE TABLE statement a PARTITION BY HASH (expr) clause, where expr is an expression that returns an integer. The user-supplied expression is evaluated each time a ...