Aikesheng Open Source Community
Apr 21, 2022 · Databases
Investigation of MySQL 5.7 Opening‑Table State Caused by Federated Engine Queries
The article analyzes why a MySQL 5.7.32 instance’s monitoring thread remains in the Opening table state when querying information_schema.tables, discovers the involvement of the Federated storage engine, reproduces the issue with a non‑existent remote server, and confirms the root cause through controlled experiments.
Database MonitoringFederated EngineMySQL
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