如何多线程删除mysql数据库连接

import mysql.connector
from multiprocessing import Pool

def delete_connection(connection_id):
    try:
        conn = mysql.connector.connect(
            host='数据库主机地址',
            user='用户名',
            password='密码',
            database='数据库名'
        )
        cursor = conn.cursor()
        query = "KILL CONNECTION %s" % connection_id
        cursor.execute(query)
        conn.commit()
        cursor.close()
        conn.close()
        return True
    except Exception as e:
        return str(e)

def get_connections():
    try:
        conn = mysql.connector.connect(
            host='数据库主机地址',
            user='用户名',
            password='密码',
            database='information_schema'
        )
        cursor = conn.cursor()
        query = "SELECT ID FROM processlist WHERE DB = '数据库名'"
        cursor.execute(query)
        connections = cursor.fetchall()
        cursor.close()
        conn.close()
        return [connection[0] for connection in connections]
    except Exception as e:
        return str(e)

if __name__ == '__main__':
    connection_ids = get_connections()
    pool = Pool(processes=4)  # 可以根据需求设置线程池大小
    results = pool.map(delete_connection, connection_ids)
    pool.close()
    pool.join()
    print(results)