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https://dev.mysql.com/doc/refman/8.0/en/group-replication-user-credentials.html
User credentials set using CHANGE REPLICATION SOURCE TO | CHANGE MASTER TO are stored in plain text in the replication metadata repositories on the server. Group Replication uses a distributed recovery process to synchronize group members when ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-view-changes.html
When the server joining the group reaches zero queued transactions and its stored data is equal to the other members, its public state changes to online. When Group Replication's distributed recovery process is carrying out state transfer from the ...
https://dev.mysql.com/doc/refman/8.0/en/host-cache.html
The server stores information about the result of this operation in the host cache. The MySQL server maintains an in-memory host cache that contains information about clients: IP address, host name, and error information. The Performance Schema ...
https://dev.mysql.com/doc/refman/8.0/en/ibd2sdi.html
During DDL operations, ROLLBACK operations, and undo log purge operations related to SDI, there may be a short interval of time when ibd2sdi fails to read SDI data stored in the tablespace. ibd2sdi is a utility for extracting serialized dictionary ...
https://dev.mysql.com/doc/refman/8.0/en/index-btree-hash.html
Systems that rely on this type of single-value lookup are known as “key-value stores”; to use MySQL for such applications, use hash indexes wherever possible. Understanding the B-tree and hash data structures can help predict how different ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-character-sets-table.html
MAXLEN The maximum number of bytes required to store one character. The CHARACTER_SETS table has these columns: CHARACTER_SET_NAME The character set name. Notes Character set information is also available from the SHOW CHARACTER SET statement. The ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-column-statistics-table.html
HISTOGRAM A JSON object describing the column statistics, stored as a histogram. The COLUMN_STATISTICS table provides access to histogram statistics for column values. For information about histogram statistics, see Section 10.9.6, “Optimizer ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-index-cache-table.html
The INNODB_FT_INDEX_CACHE table provides token information about newly inserted rows in a FULLTEXT index. Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table that ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-session-temp-tablespaces-table.html
The INNODB_SESSION_TEMP_TABLESPACES table provides metadata about session temporary tablespaces used for internal and user-created temporary tables. The INNODB_SESSION_TEMP_TABLESPACES table has these columns: ID The process or session ID. A range ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-introduction.html
INFORMATION_SCHEMA provides access to database metadata, information about the MySQL server such as the name of a database or table, the data type of a column, or access privileges. Other terms that are sometimes used for this information are data ...