Public bug reported: My sysctl vm.swappiness returns vm.swappiness = 180.
Swap kicked in when RAM is filled around 95%. I’m using zRAM as the swap. When this happened, my laptop is barely usable, as the system would have to do both the swap and compression at the same time. If `vm.swappiness = 180` worked as intended, the issue wouldn't have happened, as the swap would kick in early, which is good for zRAM system like mine, see kernel docs: https://docs.kernel.org/admin-guide/sysctl/vm.html#swappiness This is my main workstation (laptop). I used to run openSUSE Tumbleweed on it (~2 years). The experience with `vm.swappiness` is totally different. --- Here's my zRAM script: ``` #!/bin/bash mem_total_kb=$(grep MemTotal /proc/meminfo | grep -E --only-matching '[[:digit:]]+') mem_total=$((mem_total_kb * 1536)) modprobe zram echo zstd > /sys/block/zram0/comp_algorithm; echo $mem_total > /sys/block/zram0/disksize mkswap /dev/zram0 swapon -p 100 /dev/zram0 ``` Here's the content of my /etc/sysctl.conf ``` vm.swappiness=180 vm.page-cluster=0 vm.watermark_scaling_factor=125 vm.watermark_boost_factor=0 ``` I make a fresh install, not upgrading from the previous release. I also upload the screen recording of this issue on my personal Proton drive here: https://drive.proton.me/urls/5KTCS1DF58#qZTscuv5XE0M I mount ~/ramtest in the RAM, then copy the system's usr folder to ~/ramtest. Since most contents in usr are compressible, it should be perfect to show this issue. ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2064483 Title: Ubuntu 24.04 doesn't respect vm.swappiness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2064483/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
