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https://dev.mysql.com/doc/refman/8.0/en/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. This is a value of the type given in the PROCESSLIST_ID column of the ...
https://dev.mysql.com/doc/refman/8.0/en/table-cache.html
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 tables.
https://dev.mysql.com/doc/refman/8.0/en/tutorial.html
This chapter provides a tutorial introduction to MySQL by showing how to use the mysql client program to create and use a simple database. mysql (sometimes referred to as the “terminal monitor” or just “monitor”) is an interactive program ...
https://dev.mysql.com/doc/refman/8.0/en/upgrade-binary-package.html
This section describes how to upgrade MySQL binary and package-based installations on Unix/Linux. In-Place Upgrade Logical Upgrade MySQL Cluster Upgrade In-Place Upgrade An in-place upgrade involves shutting down the old MySQL server, replacing the ...
https://dev.mysql.com/doc/refman/8.0/en/using-gdb-on-mysqld.html
On most systems you can also start mysqld from gdb to get more information if mysqld crashes. With some older gdb versions on Linux you must use run --one-thread if you want to be able to debug mysqld threads. In this case, you can only have one ...
https://dev.mysql.com/doc/refman/8.0/en/windows-start-command-line.html
The MySQL server can be started manually from the command line. To start the mysqld server from the command line, you should start a console window (or “DOS window”) and enter this command: C:\> "C:\Program Files\MySQL\MySQL Server ...
https://dev.mysql.com/doc/refman/8.0/en/windows-start-service.html
On Windows, the recommended way to run MySQL is to install it as a Windows service, so that MySQL starts and stops automatically when Windows starts and stops. A MySQL server installed as a service can also be controlled from the command line using ...
https://dev.mysql.com/doc/refman/8.0/en/x-plugin-system-monitoring.html
For general X Plugin monitoring, use the status variables that it exposes. For information specifically about monitoring the effects of message compression, see Monitoring Connection Compression for X Plugin. Monitoring SQL Generated by X Plugin ...
https://dev.mysql.com/doc/refman/8.0/en/xa.html
Support for XA transactions is available for the InnoDB storage engine. The MySQL XA implementation is based on the X/Open CAE document Distributed Transaction Processing: The XA Specification. This document is published by The Open Group and ...
https://dev.mysql.com/doc/refman/8.0/en/alter-table.html
ALTER TABLE tbl_name [alter_option [, alter_option] ...] [partition_options] alter_option: { table_options | ADD [COLUMN] col_name column_definition [FIRST | AFTER col_name] | ADD [COLUMN] (col_name column_definition,...) | ADD {INDEX | KEY} ...