MySQL不同存储引擎和不同分区字段对于查询的影响(三)
char(13) DEFAULT NULL,
`birth` date DEFAULT NULL,
`sex` int(1) DEFAULT NULL,
`avatar` blob,
`address` varchar(64) DEFAULT NULL,
`regtime` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
`lastip` varchar(15) DEFAULT NULL,
`modifytime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`id`,`regtime`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8
/*!50100 PARTITION BY RANGE (YEAR(regtime ))
(PARTITION p0 VALUES LESS THAN (1996) ENGINE = MyISAM,
PARTITION p1 VALUES LESS THAN (1997) ENGINE = MyISAM,
PARTITION p2 VALUES LESS THAN (1998) ENGINE = MyISAM,
PARTITION p3 VALUES LESS THAN (1999) ENGINE = MyISAM,
PARTITION p4 VALUES LESS THAN (2000) ENGINE = MyISAM,
PARTITION p5 VALUES LESS THAN (2001) ENGINE = MyISAM,
PARTITION p6 VALUES LESS THAN (2002) ENGINE = MyISAM,
PARTITION p7 VALUES LESS THAN (2003) ENGINE = MyISAM,
PARTITION p8 VALUES LESS THAN (2004) ENGINE = MyISAM,
PARTITION p9 VALUES LESS THAN (2005) ENGINE = MyISAM,
PARTITION p10 VALUES LESS THAN (2006) ENGINE = MyISAM,
PARTITION p11 VALUES LESS THAN (2007) ENGINE = MyISAM,
PARTITION p12 VALUES LESS THAN (2008) ENGINE = MyISAM,
PARTITION p13 VALUES LESS THAN (2009) ENGINE = MyISAM,
PARTITION p14 VALUES LESS THAN (2010) ENGINE = MyISAM,
PARTITION p15 VALUES LESS THAN (2011) ENGINE = MyISAM,
PARTITION p16 VALUES LESS THAN (2012) ENGINE = MyISAM,
PARTITION p17 VALUES LESS THAN (2013) ENGINE = MyISAM,
PARTITION p18 VALUES LESS THAN (2014) ENGINE = MyISAM,
PARTITION p19 VALUES LESS THAN MAXVALUE ENGINE = MyISAM) */;
查询结果：
Sql代码
mysql> select count(*) from customer_myisam_year where id > 50000 and id < 50000
0;
+----------+
| count(*) |
+----------+
| 449999 |
+----------+
1 row in set (2.08 sec)
mysql> select count(*) from customer_myisam_year where id > 50000 and id < 50000
0;
+----------+
| count(*) |
+----------+
| 449999 |
+----------+
1 row in set (0.17 sec)
mysql> select count(*) from customer_myisam_year where regtime > '1995-01-01 00:
00:00' and regtime < '1996-01-01 00:00:00';
+----------+
| count(*) |
+----------+
| 199349 |
+----------+
1 row in set (0.56 sec)
mysql> select count(*) from customer_myisam_year where regtime > '1995-01-01 00:
00:00' and regtime < '1996-01-01 00:00:00';
+----------+
| count(*) |
+----------+
| 199349 |
1 row in set (0.13 sec)
结果汇总 www.2cto.com
序号
存储引擎
分区函数
查询条件
一次查询(sec)
二次查询(sec)
1
InnoDB
id
id
1.19
0.28
2
InnoDB
id
regtime
4.74
5.28
3
InnoDB
year
id
5.31
0.31
4
InnoDB
year
regtime
0.47
0.19
5
MyISAM
id
id
0.59
0.16
6
MyISAM
id
regtime
34.17
34.06
7
MyISAM
year
id
2.08
0.17
8
MyISAM
year
regtime
0.56
0.13
总结
1、对于按照时间区间来查询的，建议采用按照时间来分区，减少查询范围。
2、MyISAM性能总体占优，但是不支持事务处理、外键约束等。