Windows Defender questionable RAM usage

  1. Posts : 115
    Windows 10 Pro 2004

    Windows Defender questionable RAM usage

    So I decided to use built-in Windows Defender and Malwarebytes free as my second opinion scanner, I just would like to make sure that there's nothing wrong with these values of the Windows Defender RAM memory usage, it goes from 120-150MB when in idle mode, I have 16GB of DDR4 ram and it's not representing any problem, but I would just like to know if it's possible to reduce it to like 50-60MB of memory usage or something else, thanks!
      My Computer

  2. Posts : 1,244
    Windows 10 Pro x64 21H2 (Build: 19044.1415)

    150MB isn't that much at all, I've seen it go to 1,8GB or even more, this happens to me only when building large projects in Visual Studio.

    It wasn't issue to me regarding memory since I have plenty of it, the only problem was that editing files was really slow.
    To resolve my issue I added VS install directory, and root directory of my projects to defender exclusion list.

    This reduced memory usage back down to 200MB.

    In your case you don't really need to add exclusions as 150MB is normal. but it can be reduced, which means a risk of infection.
      My Computer

  3. Posts : 1,250
    Windows 10 Pro

    Memory usage in a modern OS is highly dynamic. The usage an individual process depends on what it is doing now, what it was doing previously in the session, the requirements of other processes, how much memory you have, and more. Usage can vary by a factor of 10 or more and all completely normal. Memory usage is controlled by the system memory manager with the goal of maximizing overall system performance, not minimizing memory usage. At all times the memory manager will try to find some use for as much memory as possible, even if it is only of trivial value. When there is plenty of available memory the memory manager will let applications use pretty much whatever they want with little or no restrictions. Generally, the more memory an application is allowed to use the better it will perform. Under these conditions restricting memory usage would serve no purpose and would impair performance.

    However, if you start a demanding application the memory usage of other processes will be automatically trimmed back, drastically if necessary. The advantage of having more memory is that the memory manager won't have to do this as often or as much, thus providing better performance.

    142 MB usage for this process seems very reasonable.
    I have a 4 GB Windows 10 system where usage is currently 99 MB. My 8 GB system has current usage of 268 MB. I don't consider either abnormal.
      My Computer

  4. Posts : 154
    Windows 10

    Thats not a lot of ram Defender is using, what good is having 16gb of ram if your not going to use it, ram is meant to be used.
      My Computer


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