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mysql建立索引删除索引很慢的解决_MySQL

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Release： 2016-06-01 13:30:32
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mysql建立索引删除索引很慢的解决

 

目前情况

建立索引非常慢,需8分钟...

 

目前环境:

----------------

table行： 30W

版本5.0.45-community-nt

系统XP  CPU2.11G  MEM2G

 

测试语句：

----------------------

CREATE INDEX i_atian  ON gaopinzi(atian)DROP INDEX i_atian ON gaopinzi
Copy after login

解决方法:调整my.ini的参数配制..不个_size统统加大10倍..

----------------------------------------------------

原来

read_buffer_size=64Kread_rnd_buffer_size=256Ksort_buffer_size=203Kinnodb_additional_mem_pool_size=2Minnodb_log_buffer_size=1M[SQL] DROP INDEX i_atian ON gaopinzi
Copy after login

受影响的行: 322750

时间: 459.031s

my.ini 提升10倍数

read_buffer_size=80M

read_rnd_buffer_size=80M

sort_buffer_size=88M

innodb_additional_mem_pool_size=200M

innodb_log_buffer_size=100M

QL] DROP INDEX i_atian ON gaopinzi

受影响的行: 322750

时间: 33.766s

[SQL] CREATE INDEX i_atian  ON gaopinzi(atian)
Copy after login

 

 

受影响的行: 322750

时间: 35.890s

 

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