Why MySQL’s event_scheduler Survives Kill Commands During Master‑Slave Switch and How to Use Events

This article explains the MySQL master‑slave switch process, why the internal event_scheduler thread cannot be killed, the differences between MySQL 5.7 and 8.0, and provides step‑by‑step commands for enabling, creating, viewing, modifying, and deleting scheduled events.

Database AdministrationEvent SchedulerSQL events

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Why MySQL’s event_scheduler Survives Kill Commands During Master‑Slave Switch and How to Use Events

Aikesheng Open Source Community

Jul 5, 2023 · Databases

Understanding MySQL Event Scheduler and Why Its Connections Cannot Be Killed During Master‑Slave Switch

This article explains the MySQL event_scheduler thread, why killing it during master‑slave failover produces an "Unknown thread id" warning in MySQL 8.0, how to manage events, and the impact of these internal daemon sessions on replication and failover processes.

Database AdministrationEvent SchedulerMaster-Slave Switch

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Understanding MySQL Event Scheduler and Why Its Connections Cannot Be Killed During Master‑Slave Switch