https://blog.csdn.net/xieyuooo/article/details/99877168mysql
https://blog.csdn.net/xieyuooo/article/details/10732375sql
若是參數設置不合理,或者mysql未開啓預編譯,都有可能反而下降性能ide
https://blog.csdn.net/u013743253/article/details/80491015源碼分析
另外底層若是使用了mycat或者spider,須要考慮這些中間件是否支持預編譯性能