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https://dev.mysql.com/doc/refman/8.4/en/mysqlbinlog.html
The second line starts with a date and time indicating when the statement started on the server where the event originated. (In particular, no cross-database updates should be used.) When used together with the --rewrite-db option, the --rewrite-db ... The server's binary log consists of files containing “events” that describe modifications to database ...
https://dev.mysql.com/doc/refman/8.4/en/optimizer-statistics.html
Here is a sample histogram object: { "buckets": [ [ 1, 0.3333333333333333 ], [ 2, 0.6666666666666666 ], [ 3, 1 ] ], "null-values": 0, "last-updated": "2017-03-24 13:32:40.000000", "sampling-rate": 1, "histogram-type": "singleton", ... The ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-columns.html
Columns using other data types relating to dates or times are not supported as partitioning columns. The next two sections discuss COLUMNS partitioning, which are variants on RANGE and LIST partitioning. COLUMNS partitioning enables the use of ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-info.html
When insertions, deletions, or updates are made to partitioned tables, the binary log records information about the partition and (if any) the subpartition in which the row event took place. For an update event, the partition information is recorded ... This section discusses obtaining information about existing partitions, which can be done in a number of ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-limitations.html
Reads from such tables are relatively unaffected; pending INSERT and UPDATE operations are performed as soon as the partitioning operation has completed. This section discusses current restrictions and limitations on MySQL partitioning support. The ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-management-hash-key.html
Tables which are partitioned by hash or by key are very similar to one another with regard to making changes in a partitioning setup, and both differ in a number of ways from tables which have been partitioned by range or list. For that reason, ...
https://dev.mysql.com/doc/refman/8.4/en/password-management.html
The following sections describe these capabilities, except password strength assessment, which is implemented using the validate_password component and is described in Section 8.4.3, “The Password Validation Component”. If you upgrade MySQL from ... MySQL supports these password-management capabilities: Password expiration, to require passwords to be changed ...
https://dev.mysql.com/doc/refman/8.4/en/purge-binary-logs.html
PURGE BINARY LOGS { TO 'log_name' | BEFORE datetime_expr } The binary log is a set of files that contain information about data modifications made by the MySQL server. The PURGE BINARY LOGS statement deletes all the binary log files listed in the ...The log consists of a set of binary log files, plus an index file (see Section 7.4.4, “The Binary ...
https://dev.mysql.com/doc/refman/8.4/en/recovery-from-backups.html
Now, suppose that we have a catastrophic unexpected exit on Wednesday at 8 a.m. To recover, first we restore the last full backup we have (the one from Sunday 1 p.m.). The full backup file is just a set of SQL statements, so restoring it is very ...
https://dev.mysql.com/doc/refman/8.4/en/server-status-variables.html
For example, Com_delete and Com_update count DELETE and UPDATE statements, respectively. Com_delete_multi and Com_update_multi are similar but apply to DELETE and UPDATE statements that use multiple-table syntax. This context value may differ from ... The MySQL server maintains many status variables that provide information about its ...