秒殺

http://www.javashuo.com/article/p-htqoaigj-hv.html

 

mysql樂觀鎖    經過version等進行數據區分，根據實際操做結果來判斷
https://www.sunjs.com/article/detail/fab4f0df28e64e4f97b4dd16e2946b57.html

mysql悲觀鎖    經過for update使用行級鎖，實現串行，致使阻塞
https://www.sunjs.com/article/detail/63f519a58e9042288cea3d6fd4a48ac2.html

redis樂觀鎖
https://blog.csdn.net/Evankaka/article/details/70570200
https://www.jianshu.com/p/06f1bce98451