LibreDB Studio — MySQL postsPosts about MySQL from the LibreDB Studio blog.https://libredb.org/blog/engine/mysql/enNine servers, one connection type, different answershttps://libredb.org/blog/mysql-wire-compatible-engines-one-provider/https://libredb.org/blog/mysql-wire-compatible-engines-one-provider/MariaDB, Percona, TiDB, Vitess and five more arrive through the same MySQL connection, and protocol compatibility is not capability compatibility.Sun, 23 Aug 2026 09:00:00 GMTLibreDBMySQLEngineeringDatabasesWith performance_schema off, MySQL metrics are absent not zerohttps://libredb.org/blog/mysql-performance-schema-off-metrics-absent/https://libredb.org/blog/mysql-performance-schema-off-metrics-absent/Cache hit ratio, queries per second and buffer-pool usage are omitted rather than defaulted, and two more figures mean less than their names suggest.Fri, 14 Aug 2026 09:00:00 GMTLibreDBMySQLEngineeringDatabasesReading MySQL EXPLAIN FORMAT=JSON as a plan treehttps://libredb.org/blog/mysql-explain-format-json-plan-tree/https://libredb.org/blog/mysql-explain-format-json-plan-tree/What the plan tree answers on MySQL, and where the surrounding introspection runs out: index figures here are estimates of distinct values.Fri, 17 Jul 2026 09:00:00 GMTLibreDBMySQLEngineeringDatabasesA MySQL ER diagram is bounded by one databasehttps://libredb.org/blog/mysql-er-diagram-single-database-scope/https://libredb.org/blog/mysql-er-diagram-single-database-scope/Every introspection query binds to the connected database, so a reference that crosses schemas simply does not appear as an edge on the diagram.Thu, 11 Jun 2026 09:00:00 GMTLibreDBMySQLEngineeringDatabasesA MySQL connection URI skips your SSL and timezone settingshttps://libredb.org/blog/mysql-connection-uri-ssl-ignored/https://libredb.org/blog/mysql-connection-uri-ssl-ignored/Supplying a connection string takes a different branch entirely, so the SSL panel, the timezone and cloud detection stop applying and must live in the URI.Sat, 25 Apr 2026 09:00:00 GMTLibreDBMySQLEngineeringDatabasesSecurityConnecting to MySQL in a container, and what the pool honourshttps://libredb.org/blog/mysql-connect-docker-pool-limits/https://libredb.org/blog/mysql-connect-docker-pool-limits/Port 3306 with the fixture credentials, the container-network case, and the pool settings that are quietly ignored because the driver model differs.Mon, 09 Mar 2026 09:00:00 GMTLibreDBMySQLEngineeringDatabasesStopping a runaway MySQL query is cancellation, not a timeouthttps://libredb.org/blog/mysql-cancel-runaway-query/https://libredb.org/blog/mysql-cancel-runaway-query/No server-side statement timeout is wired into the pool, so nothing kills a long query on its own and cancellation is an explicit act with a caveat.Tue, 20 Jan 2026 09:00:00 GMTLibreDBMySQLEngineeringDatabasesAgent plan mode on MySQL drafts; it does not executehttps://libredb.org/blog/mysql-agent-plan-mode-grounded-drafts/https://libredb.org/blog/mysql-agent-plan-mode-grounded-drafts/The tool-using run ends engine-unsupported here, so the useful post is what plan mode does instead: read the real schema and hand a statement to a person.Thu, 04 Dec 2025 09:00:00 GMTLibreDBMySQLEngineeringDatabasesSecurity