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https://dev.mysql.com/doc/refman/8.0/en/innodb-error-handling.html
InnoDB sometimes rolls back only the statement that failed, other times it rolls back the entire transaction. If you run out of file space in a tablespace, a MySQL Table is full error occurs and InnoDB rolls back the SQL statement. A lock wait ...A ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-space-requirements.html
If the operation takes a long time and concurrent DML modifies the table so much that the size of the temporary log file exceeds the value of innodb_online_alter_log_max_size, the online DDL operation fails with a DB_ONLINE_LOG_TOO_BIG error, and ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-crash-recovery.html
If you run myisamchk to check tables that mysqld is updating at the same time, you may get a warning that a table is corrupt even when it is not. This section describes how to check for and deal with data corruption in MySQL databases. If you run ...If your tables become corrupted frequently, you should try to find the reason ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-instrumentation-checking.html
This information is always up to date for your version of MySQL, also includes instrumentation for instrumented plugins you might have installed that are not part of the core server, and can be used by automated tools. It is always possible to ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-shutdowns.html
This may be changed with the CHANGE REPLICATION SOURCE TO statement (from MySQL 8.0.23) or CHANGE MASTER TO statement (before MySQL 8.0.23). However, the replica notices the network outage only after receiving no data from the source for ... It is ...
https://dev.mysql.com/doc/refman/8.0/en/thread-information.html
To ascertain what your MySQL server is doing, it can be helpful to examine the process list, which indicates the operations currently being performed by the set of threads executing within the server. row *************************** Id: 5 User: ...
https://dev.mysql.com/doc/refman/8.0/en/using-gdb-on-mysqld.html
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. On most systems you can also start mysqld from gdb to get more information if mysqld crashes. With some ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-transactions-current-table.html
For example: mysql> SELECT * FROM performance_schema.events_transactions_current LIMIT 1\G *************************** 1. The TIMER_START and TIMER_END values indicate when event timing started and ended. If an event has not finished, TIMER_END is ...The table stores one row per thread showing the current status of the thread's most recent monitored transaction event, so there is no system variable for configuring the table ...
https://dev.mysql.com/doc/refman/8.0/en/alter-event.html
To disable myevent, use this ALTER EVENT statement: ALTER EVENT myevent DISABLE; The ON SCHEDULE clause may use expressions involving built-in MySQL functions and user variables to obtain any of the timestamp or interval values which it contains.
https://dev.mysql.com/doc/refman/8.0/en/channels-startup-options.html
In MySQL 8.0, the FILE setting is deprecated, and TABLE is the default, so the system variables can be omitted. From MySQL 8.0.23, they must be omitted because their use is deprecated from that release. The values set for the following startup ...