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.
---
ProblemType: Bug
ApportVersion: 2.28.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/seq: archerallstars 4444 F.... pipewire
/dev/snd/controlC0: archerallstars 4448 F.... wireplumber
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 24.04
InstallationDate: Installed on 2024-04-27 (5 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
MachineType: Acer Swift SF514-52T
NonfreeKernelModules: zfs
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_o799y4@/vmlinuz-6.8.0-31-generic root=ZFS=rpool/ROOT/ubuntu_o799y4 ro quiet splash vt.handoff=1
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-6.8.0-31-generic N/A
linux-backports-modules-6.8.0-31-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2
Tags: noble wayland-session
Uname: Linux 6.8.0-31-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirt lpadmin plugdev sudo users
_MarkForUpload: True
dmi.bios.date: 11/26/2018
dmi.bios.release: 1.11
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.11
dmi.board.name: Carlsberg_KL
dmi.board.vendor: KBL
dmi.board.version: V1.11
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.11
dmi.ec.firmware.release: 1.5
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.11:bd11/26/2018:br1.11:efr1.5:svnAcer:pnSwiftSF514-52T:pvrV1.11:rvnKBL:rnCarlsberg_KL:rvrV1.11:cvnAcer:ct10:cvrV1.11:sku0000000000000000:
dmi.product.family: Swift 5
dmi.product.name: Swift SF514-52T
dmi.product.sku: 0000000000000000
dmi.product.version: V1.11
dmi.sys.vendor: Acer
modified.conffile..etc.default.apport:
# set this to 0 to disable apport, or to 1 to enable it
# you can temporarily override this with
# sudo service apport start force_start=1
enabled=0
mtime.conffile..etc.default.apport: 2024-04-27T05:52:33.862578
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https:/
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