【SQLServer】LATCH_EX是針對修改的鎖，LATCH_SH是針對讀取的鎖

LATCH_EX: 

https://www.sqlskills.com/help/waits/latch_ex/

This wait type occurs when a thread is waiting for access to a non-page data structure so that it can modify the data structure. 

 

LATCH_SH：

https://www.sqlskills.com/help/waits/latch_sh/

This wait type occurs when a thread is waiting for access to a non-page data structure so that it can read the data structure.

 

如何查看阻塞類型：

https://www.cnblogs.com/zhaoguan_wang/p/4604270.html