线程可以具有以下任何
Command值：
这是复制源上的一个线程，用于将二进制日志内容发送到副本。
该线程正在执行更改用户操作。
线程正在关闭准备好的语句。
副本连接到它的源。
副本正在连接到其源。
该线程正在执行创建数据库操作。
该线程在服务器内部，而不是为客户端连接提供服务的线程。
线程正在生成调试信息。
该线程是延迟插入处理程序。
The thread is executing a drop database operation.
The thread is executing a prepared statement.
The thread is fetching the results from executing a prepared statement.
The thread is retrieving information for table columns.
The thread is selecting a default database.
The thread is killing another thread.
The thread is retrieving long data in the result of executing a prepared statement.
The thread is handling a server ping request.
The thread is preparing a prepared statement.
The thread is producing information about server threads.
The thread is executing a statement.
The thread is terminating.
The thread is flushing table, logs, or caches, or resetting status variable or replication server information.
The thread is registering a replica server.
The thread is resetting a prepared statement.
The thread is setting or resetting a client statement execution option.
The thread is shutting down the server.
The thread is waiting for the client to send a new statement to it.
The thread is producing server status information.
Unused.