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https://dev.mysql.com/doc/refman/8.0/en/sys-ps-thread-id.html
Note As of MySQL 8.0.16, ps_thread_id() is deprecated and subject to removal in a future MySQL version. Applications that use it should be migrated to use the built-in PS_THREAD_ID() and PS_CURRENT_THREAD_ID() functions instead. See Section 14.21, ...
https://dev.mysql.com/doc/refman/8.0/en/sys-ps-trace-thread.html
in_max_runtime DECIMAL(20,2): The maximum number of seconds (which can be fractional) to collect data. in_auto_setup BOOLEAN: Whether to disable all other threads and enable all instruments and consumers. Dumps all Performance Schema data for an ...
https://dev.mysql.com/doc/refman/8.0/en/sys-schema-unused-indexes.html
This view is most useful when the server has been up and processing long enough that its workload is representative. These views display indexes for which there are no events, which indicates that they are not being used. Otherwise, presence of an ...
https://dev.mysql.com/doc/refman/8.0/en/sys-version.html
This view provides the current sys schema and MySQL server versions. Note As of MySQL 8.0.18, this view is deprecated and subject to removal in a future MySQL version. Applications that use it should be migrated to use an alternative instead. For ...
https://dev.mysql.com/doc/refman/8.0/en/too-many-connections.html
By granting the privilege to administrators and not to normal users (who should not need it), an administrator can connect to the server and use SHOW PROCESSLIST to diagnose problems even if the maximum number of unprivileged clients are connected.
https://dev.mysql.com/doc/refman/8.0/en/updating-apt-repo.html
On Debian and Ubuntu platforms, to perform an in-place upgrade of MySQL and its components, use the MySQL APT repository. See Upgrading MySQL with the MySQL APT Repository in A Quick Guide to Using the MySQL APT Repository.
https://dev.mysql.com/doc/refman/8.0/en/upgrading.html
You perform this procedure first on some test systems to make sure everything works smoothly, and then on the production systems. Note In the following discussion, MySQL commands that must be run using a MySQL account with administrative privileges ... This chapter describes the steps to upgrade a MySQL ...
https://dev.mysql.com/doc/refman/8.0/en/views.html
The following discussion describes the syntax for creating and dropping views, and shows some examples of how to use them. Views are stored queries that when invoked produce a result set. Additional Resources You may find the MySQL User Forums ...
https://dev.mysql.com/doc/refman/8.0/en/window-functions.html
The following sections discuss how to use window functions, including descriptions of the OVER and WINDOW clauses. For information about optimization and window functions, see Section 10.2.1.21, “Window Function Optimization”. MySQL supports ...
https://dev.mysql.com/doc/refman/8.0/en/charset-charsets.html
To list the available character sets and their default collations, use the SHOW CHARACTER SET statement or query the INFORMATION_SCHEMA CHARACTER_SETS table. There is one subsection for each group of related character sets. To avoid choosing the ...