30
何谓悲观锁与乐观锁 - - SegmentFault 思否
source link: https://segmentfault.com/a/1190000020898895
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
悲观锁总是假设最坏的情况，每次去拿数据的时候都认为别人会修改，所以每次在拿数据的时候都会上锁，这样别人想拿这个数据就会阻塞直到它拿到锁（共享资源每次只给一个线程使用，其它线程阻塞，用完后再把资源转让给其它线程）。传统的关系型数据库里边就用到了很多这种锁机制，比如行锁，表锁等，读锁，写锁等，都是在...
Recommend
About Joyk
Aggregate valuable and interesting links.
Joyk means Joy of geeK