Lagging system and sporadic freezes

[northfrisia]

Hi,

When using programs, which utilize opengl, I notice sporadic (that is: repeated but not with a fixed period) freezes and locks
of the particular program.
This is especially noticeable while using blender and wezterm.
For seconds nothing can be edited, input moved or clicked.

To get finally rid of this I used vmstat, top, perf and others to find evidence of what is the root of this.

And I found one clue:
Running vmstat with a refresh period of one second I got this:

[paulj]

I don't know enough to comment on your hardware choices, or whether this has an impact, nor have I used vmstat before. However, your symptoms remind me of utilising swap (even though your vmstat results suggest there isn't a memory issue). Although 32Gb of memory, and Openbox should be light touch - are you doing something particularly heavy in blender?

• You could try running some stress testing using stress-ng and see if the delays are present when not utilising the swap space.
  
• Maybe you need to consider increasing the memory size?

Hopefully someone with more knowledge will come along and help shortly!