mysql索引调优

http://wenku.baidu.com/link?url=IrtnezMjmU7hX2S9seWIXXDlhtFY5q4UquDMDtL1ua1NV-MH3bWItHOxSztOWeCKDJubgIM6iJaIFho9ZGbbyLrKLcoJQBVOwaBpSrTJ5sO

http://blog.itpub.net/13879334/viewspace-1035478/