https://bugs.kde.org/show_bug.cgi?id=396137
antonini44...@gmail.com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |antonini44...@gmail.com
--- Comment #12 from antonini44...@gmail.com ---
I think I discovered a cause for this, whuch is related to cgroups and limiting
Okular RAM.
My version of Okular is 1.7.2. My PC has 4 GB of RAM. I was often running into
slowdowns because of thrashing very often. So I set up a few cgroups in order
to actually take control of RAM. I put in cgroups preety much every program
that used more than 100 MB. Okular often went over that much RAM because I
viewed several PDF tabs. I set up cgroups according to
https://askubuntu.com/questions/836469/install-cgconfig-in-ubuntu-16-04.
I was tinkering with the cgroups and I settled for this cgroup config on Okular
like this in /etc/cgconfig:
group main/documents {
memory {
memory.limit_in_bytes = 72000000;
memory.soft_limit_in_bytes = 4000000;
}
}
How did I find it out? Yesterday, I set up a Kubuntu VM. I was also testing
Okular (Kubuntu came with Okular 1.7.3, I'm aware this bug wasn't patched on
it) to try to make the bug happen. I copied to the VM a large PDF with hundreds
of pages. I scrolled it for several minutes, page view set to fit width. I did
it franticallu almost, but nothing happened. Surprisingly, Okular didn't slow
down, nor did this bug triggered.
Today I disabled the cgroup on Okular. I opened the same PDF, and I could not
possibly trigger the bug either. I also noticed Okular beheves preety smoothly.
When the cgroup was enabled, PDFs rendered noticeably slowly. Obviously!
I just found Okular memory settings. I set it to run using as little as
needed.
Thanks Tobias Deiminger for patching out the bug in newer versions.
I hope that this helps with anything.
--
You are receiving this mail because:
You are watching all bug changes.
