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https://dev.mysql.com/doc/refman/8.0/en/precision-math.html
For example, MySQL treats a number such as .0001 as an exact value rather than as an approximation, and summing it 10,000 times produces a result of exactly 1, not a value that is merely “close” to 1. MySQL provides support for precision math: ...Precision math is based on these two features: SQL modes that control how strict the server is about accepting or rejecting invalid ...
https://dev.mysql.com/doc/refman/8.0/en/replica-io-thread-states.html
In MySQL 8.0.26, incompatible changes were made to instrumentation names, including the names of thread stages, containing the terms “master”, which is changed to “source”, “slave”, which is changed to “replica”, and “mts” (for ... The following list shows the most common states you see in the State column for a replication I/O (receiver) thread on a replica ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-columns-list.html
This is a variant of LIST partitioning that enables the use of multiple columns as partition keys, and for columns of data types other than integer types to be used as partitioning columns; you can use string types, DATE, and DATETIME columns. In ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-list.html
The chief difference between the two types of partitioning is that, in list partitioning, each partition is defined and selected based on the membership of a column value in one of a set of value lists, rather than in one of a set of contiguous ...
https://dev.mysql.com/doc/refman/8.0/en/sys-host-summary-by-file-io-type.html
These views summarize file I/O, grouped by host and event type. By default, rows are sorted by host and descending total I/O latency. The host_summary_by_file_io_type and x$host_summary_by_file_io_type views have these columns: host The host from ...total The total number of occurrences of the file I/O event for the ...
https://dev.mysql.com/doc/refman/8.0/en/sys-user-summary-by-file-io-type.html
These views summarize file I/O, grouped by user and event type. By default, rows are sorted by user and descending total latency. The user_summary_by_file_io_type and x$user_summary_by_file_io_type views have these columns: user The client user ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-dict-obj-tree.html
This means that you must know the name of any tablespace or log file group associated with a given table, or obtain this information from SHOW CREATE TABLE and then querying INFORMATION_SCHEMA.FILES, or similar means as shown here: mysql> SHOW ...
https://dev.mysql.com/doc/refman/8.0/en/data-change-optimization.html
For inserting and updating large volumes of data (known in the industry as ETL, for “extract-transform-load”), sometimes you use other SQL statements or external commands, that mimic the effects of INSERT, UPDATE, and DELETE statements. This ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-replication-group-member-stats.html
This means that the member is delayed and is not able to keep up to date with the other members of the group. Each member in a replication group certifies and applies transactions received by the group. Statistics regarding the certifier and ...The ...
https://dev.mysql.com/doc/refman/8.0/en/adding-collation-simple-8bit.html
You can check the variable value as follows, although the path name might be different on your system: mysql> SHOW VARIABLES LIKE 'character_sets_dir'; +--------------------+-----------------------------------------+ | Variable_name | Value | ...