cd6f7072ed
SHOW SLAVE STATUS / SHOW ALL SLAVES STATUS / INFORMATION_SCHEMA.SLAVE_STATUS are all served from the ST_FIELD_INFO array slave_status_info[]. Thirteen of its columns (Replicate_Do_DB, Replicate_Ignore_DB, Replicate_Do_Table, Replicate_Ignore_Table, Replicate_Wild_Do_Table, Replicate_Wild_Ignore_Table, Replicate_Ignore_Server_Ids, Gtid_IO_Pos, Replicate_Do_Domain_Ids, Replicate_Ignore_Domain_Ids, Slave_SQL_Running_State, Replicate_Rewrite_DB, and Gtid_Slave_Pos) used the no-argument Varchar() helper, which defaults to MAX_FIELD_VARCHARLENGTH/3 characters. With utf8mb3, that reserves 65532 bytes per column in the temporary table's record buffer regardless of the actual value size, and the record is allocated twice, accounting for the reported ~1.7 MB allocated on every call. Change these columns to Blob(MAX_FIELD_VARCHARLENGTH), which keeps the same maximum capacity but stores only a pointer and length in the record. Values, NULL-ability, and column order are unchanged; the client-visible column type for these columns changes from VARCHAR to BLOB. mysql-test/suite/funcs_1/r/is_columns_is.result is updated to match, since it asserts on INFORMATION_SCHEMA.COLUMNS metadata for these columns. Assisted-By: Claude AI
Code status:
ci.appveyor.com
MariaDB: The innovative open source database
MariaDB was designed as a drop-in replacement for MySQL(R) with more features, new storage engines, fewer bugs, and better performance.
MariaDB is brought to you by the MariaDB Foundation and the MariaDB Corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.
MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.
MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.
A description of the MariaDB project and a manual can be found at:
https://mariadb.com/docs/release-notes
Getting the code, building it and testing it
Refer to the following guide: https://mariadb.org/get-involved/getting-started-for-developers/get-code-build-test/ which outlines how to build the source code correctly and run the MariaDB testing framework, as well as which branch to target for your contributions.
Help
More help is available from the Maria Discuss mailing list https://lists.mariadb.org/postorius/lists/discuss.lists.mariadb.org/ and MariaDB's Zulip instance, https://mariadb.zulipchat.com/
Licensing
MariaDB is specifically available only under version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.) This is inherited from MySQL. Please see the README file in the MySQL distribution for more information.
License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.
Bug Reports
Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org
For reporting security vulnerabilities, see our security-policy.
The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server