https://dev.mysql.com/sys-ps-is-thread-instrumented.html
Returns YES or NO to indicate whether Performance Schema instrumentation for a given connection ID is enabled, UNKNOWN if the ID is unknown, or NULL if the ID is NULL. mysql> SELECT sys.ps_is_thread_instrumented(43); ...This is a value of the type ...
https://dev.mysql.com/table-cache.html
(By contrast, the index file descriptor is shared between all sessions.) The table_open_cache and max_connections system variables affect the maximum number of files the server keeps open. For example, for 200 concurrent running connections, specify ... When you execute a mysqladmin status command, you should see something like this: Uptime: 426 Running threads: 1 Questions: 11082 Reloads: 1 Open tables: 12 The Open tables value of 12 can be somewhat puzzling if you have fewer than 12 ...
https://dev.mysql.com/tp-thread-group-stats-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 25.47.2, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATS Table”. The ...
https://dev.mysql.com/tutorial.html
mysql (sometimes referred to as the “terminal monitor” or just “monitor”) is an interactive program that enables you to connect to a MySQL server, run queries, and view the results. To see a list of options provided by mysql, invoke it with ... This chapter provides a tutorial introduction to MySQL by showing how to use the mysql client program to create and use a simple ...
https://dev.mysql.com/upgrade-binary-package.html
The MySQL server must be connected to NDB for this phase to complete. If any NDB or NDBINFO tables exist, and the server cannot connect to the cluster, it exits with an error message: Failed to Populate DD tables. This section describes how to ...
https://dev.mysql.com/using-gdb-on-mysqld.html
Some symptoms are: mysqld hangs during startup (before it writes ready for connections). It is very hard to debug MySQL under gdb if you do a lot of new connections the whole time as gdb does not free the memory for old threads. You can avoid this ... On most systems you can also start mysqld from gdb to get more information if mysqld ...
https://dev.mysql.com/variables-info-table.html
If a client connects as user17 from host host34.example.com using the account 'user17'@'%.example.com, SET_USER and SET_HOST will be user17 and host34.example.com, respectively. For proxy user connections, these values correspond to the external ...
https://dev.mysql.com/windows-installation.html
Note If you installed MySQL Workbench on your system, consider using it to check your new MySQL server connection. These include, but are not limited to: To connect to the MySQL server using ODBC, you must have a Connector/ODBC driver. For more ...
https://dev.mysql.com/windows-start-command-line.html
This command invokes the MySQL administrative utility mysqladmin to connect to the server and tell it to shut down. The command connects as the MySQL root user, which is the default administrative account in the MySQL grant system. The MySQL server ...
https://dev.mysql.com/windows-start-service.html
This command invokes the MySQL administrative utility mysqladmin to connect to the server and tell it to shut down. The command connects as the MySQL root user, which is the default administrative account in the MySQL grant system. On Windows, the ...
