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https://dev.mysql.com/doc/refman/5.7/en/bit-value-literals.html
For example, a bit literal assigned to a user-defined variable is a binary string by default. To convert a bit value to printable form, use it in numeric context or use a conversion function such as BIN() or HEX(). A leading 0b is case-sensitive and ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-status-monitoring.html
When the server cannot create a mutex instrument, these results occur: No row for the instrument is inserted into the setup_instruments table. However, the content of the tables in the performance_schema database misses events. For example, ...Names ...Other mutexes have an instance per connection, or per page in various caches and data buffers, so the number of instances varies over ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-partitions-table.html
For a RANGE partition, it contains the value set in the partition's VALUES LESS THAN clause, which can be either an integer or MAXVALUE. TABLE_SCHEMA The name of the schema (database) to which the table belongs. PARTITION_EXPRESSION The expression ...Each row in this table corresponds to an individual partition or subpartition of a partitioned ...
https://dev.mysql.com/doc/refman/5.7/en/selinux.html
An SELinux context (the label applied to a system object) has the following fields: user, role, type, and security level. SELinux policy modules use SELinux contexts to define rules for how processes, files, ports, and other system objects interact ... Security-Enhanced Linux (SELinux) is a mandatory access control (MAC) system that implements access rights by applying a security label referred to as an SELinux context to each system ...
https://dev.mysql.com/doc/refman/5.7/en/thread-commands.html
Refresh The thread is flushing table, logs, or caches, or resetting status variable or replication server information. A thread can have any of the following Command values: Binlog Dump This is a thread on a replication source for sending binary ...
https://dev.mysql.com/doc/refman/5.7/en/hexadecimal-literals.html
For example, a hexadecimal literal assigned to a user-defined variable is a binary string by default. Converted to a number, it produces 0: mysql> SELECT CHARSET(X''), LENGTH(X''); +--------------+-------------+ | CHARSET(X'') | LENGTH(X'') | ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-startup-configuration.html
To enable or disable it explicitly, start the server with the performance_schema variable set to an appropriate value. For example, use these lines in your my.cnf file: [mysqld] performance_schema=ON If the server is unable to allocate any internal ... To use the MySQL Performance Schema, it must be enabled at server startup to enable event collection to ...
https://dev.mysql.com/doc/refman/5.7/en/locale-support.html
Any client can examine the value of lc_time_names or set its SESSION value to affect the locale for its own connection. This variable affects the output from the DATE_FORMAT(), DAYNAME(), and MONTHNAME() functions. The lc_time_names value does not ... The locale indicated by the lc_time_names system variable controls the language used to display day and month names and ...
https://dev.mysql.com/doc/refman/5.7/en/identifier-mapping.html
For the basic structure, MySQL represents each database as a directory in the data directory, and each table by one or more files in the appropriate database directory. This occurs on all platforms for portability of the corresponding database ...If ...
https://dev.mysql.com/doc/refman/5.7/en/replication-howto-additionalslaves.html
To do this, you can set up the new replica by copying the data directory of an existing replica, and giving the new replica a different server ID (which is user-specified) and server UUID (which is generated at startup). Check through the system ...