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https://dev.mysql.com/doc/refman/8.0/en/sys-sys-config-update-set-user.html
The sys_config_update_set_user trigger for the sys_config table is similar to the sys_config_insert_set_user trigger, but for UPDATE statements.
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-file-io-type.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. These views summarize file I/O, grouped by user and event type. By default, ...
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-file-io.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. By default, rows are sorted by descending total file I/O latency. The ...
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-stages.html
Rows for which the USER column in the underlying Performance Schema table is NULL are assumed to be for background threads and are reported with a host name of background. By default, rows are sorted by user and descending total stage latency. The ...
https://dev.mysql.com/doc/refman/8.0/en/thread-pool-tuning.html
Stalled statements generate a lot of extra overhead since they involve extra context switches and in some cases even extra thread creations. The default value of 6 (60ms) is suitable for servers that primarily execute very simple statements. This ...
https://dev.mysql.com/doc/refman/8.0/en/time.html
Note that because '00:00:00' is itself a valid TIME value, there is no way to tell, from a value of '00:00:00' stored in a table, whether the original value was specified as '00:00:00' or whether it was invalid. MySQL retrieves and displays TIME ...
https://dev.mysql.com/doc/refman/8.0/en/traceable-statements.html
Statements which are traceable are listed here: SELECT INSERT REPLACE UPDATE DELETE EXPLAIN with any of the preceding statements SET DO DECLARE, CASE, IF, and RETURN as used in stored routines CALL Tracing is supported for both INSERT and REPLACE ...
https://dev.mysql.com/doc/refman/8.0/en/transport-protocols.html
The following table shows the permissible values for --protocol and indicates the applicable platforms for each value. For programs that use the MySQL client library (for example, mysql and mysqldump), MySQL supports connections to the server based ...
https://dev.mysql.com/doc/refman/8.0/en/tuning-trace-purging.html
A subsequent SELECT from the OPTIMIZER_TRACE table returns the first limit traces of the offset oldest stored traces (if offset >= 0), or the first limit traces of the -offset newest stored traces (if offset < 0). Thus, if a statement contains ...
https://dev.mysql.com/doc/refman/8.0/en/updating-yum-repo.html
mysql_upgrade also performs other functions; for details, see Section 6.4.5, “mysql_upgrade — Check and Upgrade MySQL Tables”. For supported Yum-based platforms (see Section 2.5.1, “Installing MySQL on Linux Using the MySQL Yum ...