Use CacheSet to performance tune the system Cache size in a way not possible without tweaking internal variables the way CacheMan does.
Setting New Sizes
Simply enter the new minimum and maximum sizes and hit the Apply button. If you get an error, then one of the following conditions holds: you've entered a maximum that is smaller than the minimum, the minimum you've entered is smaller than the minimum system working-set size, or the maximum you've entered is larger than the maximum system working-set sizes. Adjust the values you've entered and try again.
You may notice that the Cache's size changes immediately and then proceeds to shrink or grow quickly. This is because the system automatically trims working sets once a second. The Cache pages that are released are still in memory, but can be relinquished quickly for use by other programs that need more memory. Similarly, the Cache can eaily regain pages as applications access file system data.
Resetting Previous Values
At any time you can restore the Cache's working set values that were active when you last started CacheSet by hitting the Reset button.
Clearing the Cache's Working Set
You can force the Cache to release all of its pages by pressing the Clear button. Note that the Cache can grow again as necessary, and that this is not the same as flushing the Cache - pages that were assigned to it are simply made available to other programs and can be reclaimed by the Cache.
Using the Command-Line Interface
You can enter the minimum and maximum working set sizes on CacheSet's command line. CacheSet will apply these new values silently. Thus, you can add CacheSet to your Start program group to automatically set the Cache's sizes every time you boot.
Usage: cacheset [minimum working set] [maximum working set]
Internally NtSetSystemInformation calls MmAdjustWorkingSetSize, which either grows an application's working set or trims it. If the third parameter passed to MmAdjustWorkingSetSize is 1, the system Cache's working set is adjusted, otherwise the adjustment occurs on the current process (the system information calls affect only the system cache). Passing in a minimum and maximum of -1 causes MmAjustWorkingSetSize to perform a working-set clear operation, releasing all pages from the application's working set..
