Modify win7 registry to play a large memory advantage

Now open the registry editor, find [HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\Session Manager\\MomoryManagement], modify the key value in the right pane (note) Yes, the prerequisite for doing this is that the memory is better than 512MB and is limited to Windows 2000/XP.

(1)"LargeSystemCache": Starts a large memory space in memory for prefetching of disk file systems. When the data requested by the program increases, Windows automatically reads ahead through the system cache, so that the program can get the required data as fast as possible. Since enabling this system buffer consumes more physical memory, the available physical memory that can be utilized by the program is reduced. Set its value to 1. This way, the system cache is increased from 4MB to 8MB.

(2)"SecondLevelDataCache" (Improve cpu performance): CPU processing speed is much greater than memory access speed, And the memory is much faster than the hard disk. In this way, between the CPU and the memory, there is a bottleneck effect on the performance between the memory and the disk. The previous "LargeSystemCache" is designed to alleviate the memory and disk bottleneck, and the CPU is also set to obtain the processed data quickly from the memory. A buffer mechanism L2 Cache (secondary cache). Adjusting this key value will enable Windows to better match the CPU's use of the caching mechanism to achieve higher data prefetch hit rates. It is recommended to set it to 512.

(3) DisablePagingExecutive: Change its value to 1 (hexadecimal), which will force all programs and data to be restricted to physical memory. Run instead of using virtual memory. Obviously, when there is enough physical memory to accomplish the required tasks, this will greatly improve the system performance.

(4)"IOPageLockLimit" (Customized input/output buffer size): The input/output system is the channel for transferring data between the device and the microprocessor. When the buffer size is expanded, the data transfer will be smoother. . Similarly, the size of the specific size depends on the size of the physical memory and the number of running tasks. If there is more memory, you can set it to 10000 (64MB) or more. When set to 0, Windows will automatically configure. After setting these up, reboot the system. In fact, the effect of modifying these is not very obvious, but there is always a comfort in the psychological, the following is the place where you feel the qualitative leap.

The bigger the memory, the faster the machine? I think most people's answers are yes, the improvement from 512MB to 1GB is obvious, so take it for granted, from 1GB to 2GB will be obvious. But I told you personally that large memory may be slower than small memory, of course, if you do not set anything.

A few days ago, I extended my Compaq N410c to 1GB of memory, 2× 512MB. After the result expansion, I found that the machine is not only the same as the original, but the sleep time is longer. This is for sure. Hibernate is to copy the contents of the memory to the hard disk. The bigger the memory, the longer the sleep time will be. This makes me very depressed. Did I spend money to upgrade my machine, but it is slower than the original? It is. I use memstate software to monitor my memory situation in real time and find that there are always more than 600 megabytes of free memory. This means that the memory of the machine is very sufficient, and even a lot of it is wasted, but the machine is still so slow. ? So I went to google to find the reason, and found that a lot of people have found this problem, and already have an authoritative explanation, here I extract the key parts, and share their own experience to share with you. Note: The modifications and usage methods here are for XP systems.

I want to introduce you to a software, RAMDisk Plus, this software is to divide a part of the memory as a disk partition, you can transfer some temporary folders to this partition, such as IE temporary Folders, this will greatly improve the speed of your browsing. The gap between the transmission speed of the memory and the transmission speed of the hard disk. I think everyone knows that using a part of the memory as the hard disk is equivalent to adding a 10,000-rpm hard disk, and the speed increase can be imagined. This is my personal experience. I took out 100MB of my memory as a partition, and then moved the temporary folder of IE to the top. After restarting, it is a moment to open the webpage. Even before, the speed is very good. In the middle of the night, it is not so fast. It seems that many times the network speed is not a bottleneck, the machine is the bottleneck, especially those pages with more pictures and need to be cached. You can try it. After drawing out this 100MB memory, my normal available memory is still more than 500MB. Fortunately, RAMDISK plus can add multiple partitions. I can draw out several partitions and put some common programs into it. It is much faster.

But remember, after the memory is powered off, there is nothing inside, but fortunately, Ramdisk plus provides the option to automatically save the shutdown, that is, you can save the contents of the virtual hard disk partition when you shut down. The actual hard disk partition in the place you specify, and then load back when booting, almost the same as hibernation, but this will cause the shutdown time and boot time to become very long, so I recommend only temporarily on the virtual hard disk partition Files, anyway, the temporary files will be emptied sooner or later, and the ramdisk will also save the trouble of manual emptying.