The ksysguard application and the "System Load" widget both report incorrect values for application memory usage. They have not been updated to use the latest kernel's /proc/meminfo's MemAvailable parameter. This means the Application memory value can be significantly larger than it should be (seen 11G rather than 4G on a server running NFS/SMB) as it includes memory that is effectively being used for caching rather than actually needed and in use by applications. Other applications such as top are ok. I will attach a patch that tries to fix this. This needs looking at to make sure it functions as desired and correctly. Reproducible: Always
Created attachment 99533 [details] Initial idea for a patch This patches ksysguard so that the application memory usage is calculated better. It may be wrong/have issues and other KDE code (System Load) may also need changing. It is supplied as an example of what I think needs to be done, but it will likely need more work.
This is a valid problem. Linux kernel >= 3.14 provides a "MemAvailable" field in /proc/meminfo[1] which gives the estimated amount of memory available for applications. The patch needs some work. Take a look at how libgtop added support[2]. [1] https://github.com/torvalds/linux/commit/34e431b0ae398fc54ea69ff85ec700722c9da773 [2] https://gitlab.gnome.org/GNOME/libgtop/commit/0580b2fb2ca8fdde2031c8aba991bafac64d8dbd
John, Could you please take a look at this patch?
Could you put patches on phabricator? They tend to get lost otherwise.