我需要运行一个总长度为100 000次(每张纸张开具约10 000次)的PHP lo,每个 lo有大约5个MySQL UPDATES。 当我跑了50次,需要3次。 当我跑了1 000次,需要约1300次。 你们可以看到,我的SQL正在以更多的人民民主党减缓ALOT。
这是最新的一个例子:
mysql_query("UPDATE table SET `row1`=`row1` +1 WHERE `UniqueValue`= 5 ");
它是随机产生于PHP的,但我可以将其储存在一个变数中,并管理它的每一 n。
是否有办法使MySQL和PHP能够以一致的速度运行(PHP储存隐藏的变数吗?),或将文字分开,这样做吗?
注:我为了发展目的,而不是为了生产目的这样做,因此只有1台电脑能够查阅数据。
http://www.php.net/manual/en/pdo.prepared-statements.php“rel=“nofollow noreferer”>。 两项主要好处之一是重复查询更为有效。
更快速地利用类似的东西:
mysql_query("UPDATE table SET `row1`=`row1` + 1 WHERE `UniqueValue` IN (5, ... 10)");
假设你掌握独特的指数 理论价值。 你们可以提出多达8个有违约情况的咨监委的问询,但1个咨监委现在应当足够。 这将是一个巨大的问题,但得更快地,>
您还可以暂时完全取消指数更新,这样就能够使情况更快:
ALTER TABLE table DISABLE KEYS;
ALTER TABLE table ENABLE KEYS;
在N时间之后(如果你与InnoDB的表格一起工作),将汽车换成门并明确进行交易。
增加<代码>UniqueValue的索引,并删除<代码>row1和其他未使用的索引。
除了对<代码>的<>row1>和的“UniqueValue领域进行索引编制外,还确保它们使用诸如INTE/2005/>/code>等数字数据类型,并在中删除 Clause.
mysql_query("UPDATE table SET `row1`=`row1` +1 WHERE `UniqueValue`=5");
Else MySQL需要将其编成册,然后送回/退出运行成本。
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