*The working set of a process is the set of memory pages currently visible to the process in physical RAM memory. These pages are resident and available for an application to use without triggering a page fault.
*The working set of a process consists of the set of resident physical pages visible to the process. When a thread accesses a page that is not in the working set of its process， a page fault occurs. Before the thread can continue， the virtual memory manager must add the page to the working set of the process. A larger working set increases the probability that a page will be resident in memory， and decreases the rate of page faults.
*When you increase the working set size of an application， you are taking away physical memory from the rest of the system.
*Suppose you have a 16-megabyte system and you set your minimum to four megabytes. In effect， this takes away four megabytes from the system. Other applications may be unable to get their minimum working set.
可见，Working Set是被真实地从物理内存中区分出来的。一个程序占用了多少Working Set，物理内存中就有多少空间不能被其它程序运用。
*Reducing memory consumption is always a beneficial goal. If you call SetProcessWorkingSetSize(0xffffffff， 0xffffffff)， this tells the system that your working set can be released. This does not change the current sizing of the working set， it just allows the memory to be used by other applications. It is a good idea to do this when your application goes into a wait state.
*Windows NT 3.5 allows processes to increase their working set size by using SetProcessWorkingSetSize(). This API is also useful to trim your minimum working set size if you want to run many processes at once， because each process has the default minimum working set size reserved， no matter how small the process actually is.
Windows会为每个进程保存一个默许数值的working set，但是这个保存的Working set或许会比该process实际需要的大。能够用SetProcessWorkingSetSize()来对进程的Working set进行裁剪，只保存进程现在现已占用的页面，闲暇的就释放掉给其它运用运用。