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Oracle笔记(8)——latch

Posted by nanxiao on 三月 2, 2016 in Oracle笔记 |

LatchOracle串行的并发访问内存的机制,也可以把latch看成是lock。当一个进程获取一个latch时,它或者成功或者失败。但是失败后,进程不会释放CPU,而是会继续尝试获取latch(具体行为取决于mode)。

参考资料:
Latches and Latch Contention
Latch and Mutex ContentionTroubleshooting in Oracle

 

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