如何最小化程序的处理时间？

Question

我创建了一个非常复杂的存储过程，用于检查 c_sent_messages table 中的密码是否存在于 c_passwords table 中。然后它输入一些消息并更新数据库中的记录。最后是从c_sent_messages到archivetable的记录。在我添加将记录添加到 archive 并从 c_sent_messages 中删除消息的两行之前一切都很好（不膨胀存储）

INSERT INTO archive SELECT *, NOW() FROM c_sent_messages WHERE id=idi;          
DELETE FROM c_sent_messages WHERE  id=idi;

我的处理器也是一个不错的处理器（Intel 7700 HQ），我不是运行任何其他 software/process。在我添加这两行之后，该过程将记录添加到 archive table 花费了太多时间。我想尽量减少此过程的处理时间。有什么办法让它更快吗？（添加 1000 条记录到 archive 花了 120 秒）


DELIMITER $$
CREATE PROCEDURE flood () 
BEGIN
DECLARE i INT DEFAULT 0;
    declare ifExist int DEFAULT 0;
    DECLARE numara VARCHAR(10);
    declare adamin_gonderdigi varchar(150);
  declare idi int default 0;


    myloop: LOOP




      SET idi               = (SELECT id  from c_sent_messages where stats = 'N' limit 1);
        SET numara            = (SELECT sender  from c_sent_messages where id = idi);
        SET adamin_gonderdigi = (SELECT msg_text from c_sent_messages WHERE id = idi);

      select count(1) into ifExist from c_passwords b WHERE adamin_gonderdigi = b.pass;

        IF ifExist > 0 THEN
            set ifExist = 0;
                select count(1) into ifExist from c_sent_messages a WHERE a.stats ="N";
                IF ifExist > 0 THEN
                    INSERT INTO c_received_messages ( receiver, sender, msg_text, stats, x_date )
                        VALUES
                            (numara, "5757", "Code is received successfully.", "S",NOW());
                    UPDATE c_passwords a SET a.stats = "S", a.x_date = NOW()
                    WHERE pass = adamin_gonderdigi;         

                        update c_sent_messages set stats = 'S' where id = idi;

                ELSE

                    INSERT INTO c_received_messages ( receiver, sender, msg_text, stats, x_date )
                    VALUES(numara,"5757","Code is used before!","S",NOW());

                    update c_sent_messages set stats = 'U' where id = idi;

                END IF; 

        ELSE 
            INSERT INTO c_received_messages  ( receiver, sender, msg_text, stats, x_date )
            VALUES(numara,"5757","Please send a valid code!","S",NOW());

            update c_sent_messages set stats = 'F' where id = idi;
        END IF;     

        INSERT INTO archive SELECT *, NOW() FROM c_sent_messages WHERE id = idi;            
        DELETE FROM c_sent_messages WHERE  id=idi;

    SET i = i + 1;
        IF
            i = 900000 THEN
                LEAVE myloop;

        END IF;     
    END LOOP myloop;

END $$
DELIMITER;

Answer 1

循环开始时的 3 个 SELECT 可以用一个 SELECT 完成——参见 JOIN。
你有INDEX(stats, id)吗？
看看 IODKU 是否可以替换您的 select/if/insert/update 序列。
尝试在不循环 900000 次的情况下在单个 SQL 语句中完成整个过程。

如何最小化程序的处理时间？

How to minimize process time of the procedure?

mysql

stored-procedures

insert-update

database-performance