通过在 mysql 表上添加索引来执行时间
我正在更改包含 200 万行以上的表的索引。 执行时间现在超过 3000 秒。 我认为我的电脑上有任何问题,因为之前的其他更改从未在同一张桌子上花费这么长时间。我已将所有索引添加到现有数据中。 有人体验过更改现有 200 万行的索引需要多长时间吗?
我如何检查本地 mysql 安装是否正常?
这是表格定义:
CREATE TABLE `sal_forwarding` (
`sid` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
`f_shop` INT(11) NOT NULL,
`f_offer` INT(11) DEFAULT NULL,
`link` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL,
`offerCode` VARCHAR(255) DEFAULT NULL,
`sub2` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`forwardTime` DATETIME NOT NULL,
`cid` CHAR(32) DEFAULT NULL,
`f_partner` VARCHAR(20) NOT NULL,
`t` VARCHAR(30) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT '0',
`toolbarUser` TINYINT(1) NOT NULL DEFAULT '0',
`blog` TINYINT(1) DEFAULT '0',
`clickedPosition` INT(10) UNSIGNED DEFAULT NULL,
`usedFrame` TINYINT(1) NOT NULL DEFAULT '0',
`sub3` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub4` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub5` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub6` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub7` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`f_affiliateId` TINYINT(3) UNSIGNED NOT NULL,
`browser` VARCHAR(50) DEFAULT NULL,
`bversion` VARCHAR(5) DEFAULT NULL,
`os` VARCHAR(50) DEFAULT NULL,
`forwardDate` DATE NOT NULL,
PRIMARY KEY (`sid`),
KEY `f_shop` (`f_shop`,`forwardDate`,`cid`),
KEY `f_partner` (`f_partner`,`forwardDate`),
KEY `forwardDate` (`forwardDate`,`cid`),
KEY `forwardDate_2` (`forwardDate`,`f_shop`),
KEY `forwardDate_3` (`forwardDate`,`f_shop`,`f_partner`),
KEY `forwardDate_4` (`forwardDate`,`f_partner`,`cid`),
KEY `forwardDate_5` (`forwardDate`,`f_affiliateId`),
KEY `forwardDate_6` (`forwardDate`,`f_shop`,`sid`)
) ENGINE=INNODB AUTO_INCREMENT=10747233 DEFAULT CHARSET=latin1;
非常感谢。
I'm changing an index on a table with more the 2million rows.
The execution time is now longer then 3000 seconds.
I think anything is working wrong on my pc because other changes before never took so long on the same table. I've added all indices with existing data.
Has anybody an experience how much time does it take to change an index with 2 million existsing rows?
How can i check if anything is working fine on my local mysql installation?
Here is the table definition:
CREATE TABLE `sal_forwarding` (
`sid` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
`f_shop` INT(11) NOT NULL,
`f_offer` INT(11) DEFAULT NULL,
`link` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL,
`offerCode` VARCHAR(255) DEFAULT NULL,
`sub2` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`forwardTime` DATETIME NOT NULL,
`cid` CHAR(32) DEFAULT NULL,
`f_partner` VARCHAR(20) NOT NULL,
`t` VARCHAR(30) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT '0',
`toolbarUser` TINYINT(1) NOT NULL DEFAULT '0',
`blog` TINYINT(1) DEFAULT '0',
`clickedPosition` INT(10) UNSIGNED DEFAULT NULL,
`usedFrame` TINYINT(1) NOT NULL DEFAULT '0',
`sub3` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub4` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub5` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub6` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`sub7` VARCHAR(200) CHARACTER SET latin1 COLLATE latin1_german1_ci DEFAULT NULL,
`f_affiliateId` TINYINT(3) UNSIGNED NOT NULL,
`browser` VARCHAR(50) DEFAULT NULL,
`bversion` VARCHAR(5) DEFAULT NULL,
`os` VARCHAR(50) DEFAULT NULL,
`forwardDate` DATE NOT NULL,
PRIMARY KEY (`sid`),
KEY `f_shop` (`f_shop`,`forwardDate`,`cid`),
KEY `f_partner` (`f_partner`,`forwardDate`),
KEY `forwardDate` (`forwardDate`,`cid`),
KEY `forwardDate_2` (`forwardDate`,`f_shop`),
KEY `forwardDate_3` (`forwardDate`,`f_shop`,`f_partner`),
KEY `forwardDate_4` (`forwardDate`,`f_partner`,`cid`),
KEY `forwardDate_5` (`forwardDate`,`f_affiliateId`),
KEY `forwardDate_6` (`forwardDate`,`f_shop`,`sid`)
) ENGINE=INNODB AUTO_INCREMENT=10747233 DEFAULT CHARSET=latin1;
Thank you very much.
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在大表上创建索引是一个相对缓慢的过程,虽然我不是专家,但我相信你在这方面无能为力。
时间不仅取决于表的大小,而且很大程度上取决于创建索引的列。
我猜花费 3000 秒是正常的,对于有 200 万行的表,我曾经在一个有近 350 万行的表上创建了复合索引,花了 2 个多小时......
以下是一些人们分享的链接MySQL大表创建索引的经验
http://lists.mysql.com/mysql/212738
<一href="http://forums.mysql.com/read.php?24,356410,356889#msg-356889" rel="nofollow">http://forums.mysql.com/read.php?24,356410 ,356889#msg-356889
Index creation on large table is relatively slow process, and although I am not an expert, but I believe there is nothing much that u can do in this regard.
Time does not only depend on the size of table, but it also largely depends upon the column on which index is being created.
taking 3000 seconds is normal i guess, for table with 2 million rows, I once created composite index on a table with almost 3.5 million rows and it took more than 2 hours.....
Here are some links where people have shared about their experiences of creating index on large tables in MySQL
http://lists.mysql.com/mysql/212738
http://forums.mysql.com/read.php?24,356410,356889#msg-356889