KDE Will Nicely Notify You When Apps Are Being Killed Due To Out-Of-Memory

[moonwalker]

And brace for a bad time. Linux user space code generally either assumes that malloc never fails, or if there are error handling paths, they tend to be not well-tested. Long story short, malloc returning NULL is likely to result in fireworks.

I believe I did imply as much.

[mrg666]

I just did another check on Plasma RAM usage on my laptop. It is Latitude 7400 with 16 GB RAM and Intel integrated GPU. The first is from text console (CTRL-ALT-F2) without Plasma session. Second is after logging into Plasma session using Konsole. Command is "free -h". Plasma version 6.2.2, QT 6.8 running in FC41. Plasma is using just 300MB.

No Plasma

               total        used        free      shared  buff/cache   available
Mem:            15Gi       1.3Gi        10Gi       223Mi       4.2Gi        14Gi
Swap:          8.0Gi          0B       8.0Gi

Plasma running

               total        used        free      shared  buff/cache   available
Mem:            15Gi       1.6Gi        10Gi       199Mi       4.2Gi        13Gi
Swap:          8.0Gi          0B       8.0Gi

[Rovano]

A few months ago, I was at a machine about 13 years old with AMD 4cores. The machine has 2GB DDR2 RAM. I ran KDE6 there for a test. It ran beautifully smoothly.

Avis could still rely on the GPU memory consumed.

[WileEPyote]

This might be self-inflicted pain.

Without swap, the kernel can't reclaim anonymous data pages, so they all use up system RAM, even effectively unused ones. The only way the kernel can reclaim memory is by evicting file-backed pages, a lot of which are from executable binaries. As memory pressure increases, the kernel spends increasingly more time faulting back in pages to execute.

Orrrrrrr, hear me out. Install an ungodly amount of ram and never worry about OOM or swap again.