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https://dev.mysql.com/doc/refman/8.0/en/innodb-transaction-scheduling.html
You can view transaction scheduling weights by querying the TRX_SCHEDULE_WEIGHT column in the Information Schema INNODB_TRX table. For information about using INNODB_METRICS counters, see Section 17.15.6, “InnoDB INFORMATION_SCHEMA Metrics ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-troubleshooting-recovery.html
From MySQL 8.0.26, checkpoints and advancing the checkpoint LSN are not permitted until redo log recovery is complete and data dictionary dynamic metadata (srv_dict_metadata) is transferred to data dictionary table (dict_table_t) objects. If an ...
https://dev.mysql.com/doc/refman/8.0/en/insert-delayed.html
The DELAYED option for the INSERT statement is a MySQL extension to standard SQL. The server recognizes but ignores the DELAYED keyword, handles the insert as a nondelayed insert, and generates an ER_WARN_LEGACY_SYNTAX_CONVERTED warning: INSERT ...
https://dev.mysql.com/doc/refman/8.0/en/integer-types.html
The following table shows the required storage and range for each integer type. MySQL supports the SQL standard integer types INTEGER (or INT) and SMALLINT. As an extension to the standard, MySQL also supports the integer types TINYINT, MEDIUMINT, ...
https://dev.mysql.com/doc/refman/8.0/en/is-null-optimization.html
This optimization does not occur in cases when the column might produce NULL anyway (for example, if it comes from a table on the right side of a LEFT JOIN). MySQL can perform the same optimization on col_name IS NULL that it can use for col_name = ...
https://dev.mysql.com/doc/refman/8.0/en/json-function-reference.html
Table 14.22 JSON Functions Name Description Introduced Deprecated -> Return value from JSON column after evaluating path; equivalent to JSON_EXTRACT(). ->> Return value from JSON column after evaluating path and unquoting the result; equivalent to ...
https://dev.mysql.com/doc/refman/8.0/en/json-modification-functions.html
MySQL recognizes the escape sequences shown in Table 14.23, “JSON_UNQUOTE() Special Character Escape Sequences”. The functions in this section modify JSON values and return the result. JSON_ARRAY_APPEND(json_doc, path, val[, path, val] ...) ...
https://dev.mysql.com/doc/refman/8.0/en/keyring-oci-plugin.html
As indicated by the preceding table, several plugin-related system variables are mandatory and must also be set: Oracle Cloud Infrastructure uses Oracle Cloud IDs (OCIDs) extensively to designate resources, and several keyring_oci parameters specify ... Note The keyring_oci plugin is an extension included in MySQL Enterprise Edition, a commercial ...
https://dev.mysql.com/doc/refman/8.0/en/ldml-collation-example.html
To add a UCA collation for a Unicode character set without recompiling MySQL, use the following procedure. If you are unfamiliar with the LDML rules used to describe the collation's sort characteristics, see Section 12.14.4.2, “LDML Syntax ...
https://dev.mysql.com/doc/refman/8.0/en/linux-installation-debian.html
Oracle provides Debian packages for installing MySQL on Debian or Debian-like Linux systems. The packages are available through two different channels: The MySQL APT Repository. This is the preferred method for installing MySQL on Debian-like ...