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https://dev.mysql.com/doc/refman/5.7/en/too-many-connections.html
If clients encounter Too many connections errors when attempting to connect to the mysqld server, all available connections are in use by other clients. By granting the privilege to administrators and not to normal users (who should not need it), ...The permitted number of connections is controlled by the max_connections system ...
https://dev.mysql.com/doc/refman/5.7/en/cannot-find-table.html
Even for file systems that are not case-sensitive, such as on Windows, all references to a given table within a query must use the same lettercase. You can check which tables are in the default database with SHOW TABLES.
https://dev.mysql.com/doc/refman/5.7/en/innodb-information-schema-metrics-table.html
The TIME_ENABLED and TIME_ELAPSED values indicate when the counter was last enabled and how many seconds have elapsed since that time. Note Because each counter adds a degree of runtime overhead, use counters conservatively on production servers to ... The INNODB_METRICS table provides information about InnoDB performance and resource-related ...
https://dev.mysql.com/doc/refman/5.7/en/compatibility.html
We use the phrase “the SQL standard” or “standard SQL” to mean the current version of the SQL Standard at any time. We are not targeting real-time support, although MySQL replication capabilities offer significant functionality. This ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-memory-per-fragment.html
You can also obtain this list by executing TABLE ndbinfo.dict_obj_types in the mysql client. Secondary ordered indexes are fragmented and distributed in the same way as the base table. In the memory_per_fragment table, we can see that ordered ...
https://dev.mysql.com/doc/refman/5.7/en/windows-create-option-file.html
For options that are used every time the server starts, you may find it most convenient to use an option file to specify your MySQL configuration. Note When using the MySQL Installer to install MySQL Server, it creates the my.ini in the default ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-file-instances-table.html
The file_instances table lists all the files seen by the Performance Schema when executing file I/O instrumentation. If a file was opened and then closed, it was opened 1 time, but OPEN_COUNT is 0. If a file on disk has never been opened, it is not ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-install-windows-binary.html
For this example, we refer to ndbd.exe as the data node executable, but you can install ndbmtd.exe, the multithreaded version of this program, instead, in exactly the same way. Note As with other Windows programs, NDB Cluster executables are named ...You should also have the MySQL client (mysql.exe) on this ...
https://dev.mysql.com/doc/refman/5.7/en/fetch.html
Be aware that another operation, such as a SELECT or another FETCH, may also cause the handler to execute by raising the same condition. This statement fetches the next row for the SELECT statement associated with the specified cursor (which must be ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-cond-instances-table.html
The cond_instances table lists all the conditions seen by the Performance Schema while the server executes. A condition is a synchronization mechanism used in the code to signal that a specific event has happened, so that a thread waiting for this ...