1 – DisablePagingExecutive
Often referred to as: Disable Paging of Kernel.
Under all but the most very extreme circumstances it does nothing. What this setting does is force Windows to keep the kernel (the core of the operating system) in RAM. This means that the kernel will reside in the fastest storage area in your computer. Sounds great right? Guess what? Windows does this anyway unless the system comes under such an extremely heavy load that it needs the space. The very millisecond that the system has free memory, it will put the kernel right back into RAM. If the system is in such dire straits that it needs to use the space that the kernel is using I would say you are on your way to a crash and you better let whatever wants the space have it. You also better add more memory ASAP.
Oh, and by-the-way – Some of the kernel cannot be forced out of RAM.
2 – LargeSystemCache
Often referred to as: Large System Cache
This setting is also achieved by going to:
XP- Start > Settings > Control Panel > System > Advanced > Performance Settings > Advanced > Memory usage = System Cache.
Vista / 7 – System Properties > Advanced > Performance (settings) > Processor scheduling > Adjust for best performance of > Background services
Under Windows this tweak could be of some value under various odd circumstances. However, it causes problems with many drivers/hardware/applications.*** This tweak is really designed for machines running as a server. If you use this tweak and have problems don’t be whining at the driver/application writers for writing code that takes advantage of the way Windows uses memory. They didn’t ask you to turn your machine into a server.
***This tweak is known to negatively affect ATI video cards, storage devices, and several benchmark applications amongst other things.