What’s a good way of checking how much (actual) memory is currently
being used vs. how much is sql Server allocated to itself?

我一直在诉诸于memory_utilization_百分比,但运行以下内容后,似乎并没有改变内存.

SELECT  [Memory_usedby_sqlserver_MB] = ( physical_memory_in_use_kb / 1024 ),[Memory_utilization_percentage] = memory_utilization_percentage 
FROM    sys.dm_os_process_memory;

DBCC FREESYSTEMCACHE ('ALL')
DBCC FREESESSIONCACHE
DBCC FREEPROCCACHE

SELECT  [Memory_usedby_sqlserver_MB] = ( physical_memory_in_use_kb / 1024 ),[Memory_utilization_percentage] = memory_utilization_percentage 
FROM    sys.dm_os_process_memory;

解决方案是删除sql Server的最大服务器内存,并再次增加它,以强制sql Server释放未使用但已分配的内存.但是,这种方法的一个问题是,我们无法确定减少最大服务器内存的距离,因此可能会导致杀死sql Server的风险.这就是为什么在减少最大服务器内存的值之前了解sql Server实际使用的原因很重要.