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https://dev.mysql.com/doc/refman/8.0/en/error-log-format.html
The ts (timestamp) key was added in MySQL 8.0.20 and is unique to the JSON-format log sink. The server handles error log messages that are generated early in the startup process as follows: Prior to MySQL 8.0.14, the server generates messages with ...For all log sinks, the thread ID included in error log messages is that of the thread within mysqld responsible for writing the ... Each error log sink (writer) component has a characteristic output format it uses to write ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-recovery.html
After restoring the base backup, do a point-in-time recovery from the binary log files using mysqlbinlog and mysql to restore the changes that occurred after the backup was made. To achieve point-in-time recovery after restoring a backup, you can ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-object-filtering.html
The ENABLED column indicates whether matching objects are monitored, and TIMED indicates whether to collect timing information. Setting the TIMED column affects Performance Schema table contents as described in Section 29.4.1, “Performance Schema ... The setup_objects table controls whether the Performance Schema monitors particular table and stored program ...
https://dev.mysql.com/doc/refman/8.0/en/program-options.html
There are several ways to specify options for MySQL programs: List the options on the command line following the program name. This is common for options that you want the program to use each time it runs. This method is useful for options that you ...This is common for options that apply to a specific invocation of the ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-responses-failure-expel.html
You can use the group_replication_member_expel_timeout system variable, which is available from MySQL 8.0.13, to allow additional time between the creation of a suspicion and the expulsion of the suspect member. This is also the behavior of a group ...A group member is then expelled when another member's suspicion of it (or its own suspicion of itself) times ...A suspicion is created when ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-change-buffer.html
Merging cached changes at a later time, when affected pages are read into the buffer pool by other operations, avoids substantial random access I/O that would be required to read secondary index pages into the buffer pool from disk. During this ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-storage-engine.html
Table 18.2 MyISAM Storage Engine Features Feature Support B-tree indexes Yes Backup/point-in-time recovery (Implemented in the server, rather than in the storage engine.) Yes Cluster database support No Clustered indexes No Compressed data Yes ...
https://dev.mysql.com/doc/refman/8.0/en/ibd2sdi.html
ibd2sdi can be run on file-per-table tablespace files (*.ibd files), general tablespace files (*.ibd files), system tablespace files (ibdata* files), and the data dictionary tablespace (mysql.ibd). ibd2sdi can be used at runtime or while the server ... ibd2sdi is a utility for extracting serialized dictionary information (SDI) from InnoDB tablespace ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-temporary-tablespace.html
Beginning with MySQL 8.0.16, the storage engine used for on-disk internal temporary tables is InnoDB. Because the pool of session temporary tablespaces is recreated each time the server is started, space IDs for session temporary tablespaces are not ... InnoDB uses session temporary tablespaces and a global temporary ...
https://dev.mysql.com/doc/refman/8.0/en/sys-diagnostics.html
Parameters in_max_runtime INT UNSIGNED: The maximum data collection time in seconds. in_interval INT UNSIGNED: The sleep time between data collections in seconds. Note The more instruments and consumers enabled, the more impact on MySQL server ...