What is the reason why the CPU usage is not high but the physical memory is high?

Reason: CPU usage has nothing to do with memory occupancy. Some programs can fully load the CPU but occupy little memory, while others can fill the memory with little need for CPU work. The memory is just A warehouse for data processed by the CPU. All programs use memory when running, especially anti-virus software or startup items. As long as it is running, it is using memory but not running the CPU, because it runs but does not use it; so , there will be a phenomenon where the brain CPU usage is very low, but the physical memory is high.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Why is my computer’s CPU usage so low but the physical memory so high?

The CPU usage has nothing to do with the memory usage. Some programs can fill up the CPU but take up almost no memory, while others can fill up the memory and require almost no CPU work. Memory is nothing but a warehouse for data processed by the CPU.

A certain software has three functions A, B, and C. When running, the data required by A, B, and C are loaded into the memory; but in actual use, only a small part of the simple functions of A may be used. , then the memory usage will become large and the CPU usage will be small.

All programs use memory when running, especially anti-virus software or startup items. As long as it is running, it is using memory, but it does not The CPU is running because it is running but not used. Therefore, the brain CPU usage is very low but the physical memory is high.

If you are running a game, if it is a big game, it will require CPU operation, and the CPU usage will be very high. You can end the tasks from the memory for those things that you are not running. My computer generally has around 350 RAM. My RAM is 2G and is rarely used, so running things is very fast and I don’t need to. All things end the task, so that the phenomenon of high physical memory disappears.

Extended information:

Physical memory (Physical memory) is relative to logical memory words. Physical memory refers to the memory space obtained through physical memory sticks, while logical memory refers to dividing an area of ​​the hard disk as memory.

The main function of physical memory is to provide temporary storage for the operating system and various programs when the computer is running. Common physical memory specifications include 256M, 512M, 1G, 2G, etc. Nowadays, with the development of computer hardware, 4G, 8G or even higher capacity memory specifications have appeared.

Physical memory, the size of the memory space that can be directly addressed by the CPU's address line. For example, 8086 only has 20 address lines, so its addressing space is 1MB. Let's say that 8086 can support 1MB of physical memory.

Even if a 128M memory module is installed on the board, we can only say that the 8086 has 1MB of physical memory space. In the same way, 32-bit 386 or above CPU can support a maximum of 4GB of physical memory space.

• Solution 1 for high physical memory usage:

  Install one more piece of physical memory. Of course, this is the most fundamental and fastest way to solve the problem. The existing 2G memory is just enough for Win7. If we install too many programs, it will definitely cause the system to run slowly. If possible, directly switch to a 64-bit operating system so that the system can better recognize and call large memory.

• Solution 2 for high physical memory usage:

  Install some memory sorting software. Before you can run large programs, run the memory sorting software first to sort the memory. to mitigate high memory usage.

• Solution three to deal with high physical memory usage:

  Set a larger virtual memory. The virtual memory setting must be 1.5 times the actual memory.

  Technical documentation: How to set up virtual memory How to set up virtual memory best

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