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Alexey Avramov 2020-12-31 21:50:55 +09:00
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@ -37,13 +37,19 @@ Also look at these discussions:
## Solution ## Solution
Use one of the userspace OOM killers. Use one of the userspace OOM killers:
- Use of [earlyoom](https://github.com/rfjakob/earlyoom). This is a simple, stable and tiny OOM preventer written in C (the best choice for emedded and old servers). It has a minimum dependencies and can work with oldest kernels. It is enabled by default on Fedora 32 Workstation. - Use of [earlyoom](https://github.com/rfjakob/earlyoom). This is a simple, stable and tiny OOM preventer written in C (the best choice for emedded and old servers). It has a minimum dependencies and can work with oldest kernels. It is enabled by default on Fedora 32 Workstation.
- Use of [oomd](https://github.com/facebookincubator/oomd). This is a userspace OOM killer for linux systems written in C++ and developed by Facebook. This is the best choice for use in large data centers. It needs Linux 4.20+. - Use of [oomd](https://github.com/facebookincubator/oomd). This is a userspace OOM killer for linux systems written in C++ and developed by Facebook. This is the best choice for use in large data centers. It needs Linux 4.20+.
- Use of [low-memory-monitor](https://gitlab.freedesktop.org/hadess/low-memory-monitor/). There's a [project announcement](http://www.hadess.net/2019/08/low-memory-monitor-new-project.html). - Use of [low-memory-monitor](https://gitlab.freedesktop.org/hadess/low-memory-monitor/). There's a [project announcement](http://www.hadess.net/2019/08/low-memory-monitor-new-project.html).
- Use of [psi-monitor](https://github.com/endlessm/eos-boot-helper/tree/master/psi-monitor). It's used by default on [Endless OS](https://endlessos.com/). - Use of [psi-monitor](https://github.com/endlessm/eos-boot-helper/tree/master/psi-monitor). It's used by default on [Endless OS](https://endlessos.com/).
- Use of `nohang`: nohang is earlyoom on steroids and has many useful features, see below. Maybe this is a good choice for modern desktops and servers if you need fine-tuning. - Use of `nohang`: nohang is earlyoom on steroids and has many useful features, see below. Maybe this is a good choice for modern desktops and servers if you need fine-tuning.
Use these tools to improve responsiveness during heavy swapping:
- [le9-patch](https://github.com/hakavlad/le9-patch): Protect active file pages to prevent thrashing and improve responsiveness under low-memory conditions. It's kernel-side solution that can fix OOM killer behavior.
- [prelockd](https://github.com/hakavlad/prelockd): Lock shared libraries and executables in memory to improve system responsiveness under low-memory conditions.
- [memavaild](https://github.com/hakavlad/memavaild): Keep amount of available memory by by evicting memory of selected cgroups into swap space.
- [uresourced](https://gitlab.freedesktop.org/benzea/uresourced): This daemon will give resource allocations to active graphical users. It's [enabled by default](https://fedoraproject.org/wiki/Changes/Reserve_resources_for_active_user_WS) on Fedora 33 Workstation.
Of course, you can also [download more RAM](https://downloadmoreram.com/), tune [virtual memory](https://www.kernel.org/doc/Documentation/sysctl/vm.txt), use [zram](https://www.kernel.org/doc/Documentation/blockdev/zram.txt)/[zswap](https://www.kernel.org/doc/Documentation/vm/zswap.txt) and use [limits](https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html) for cgroups. Of course, you can also [download more RAM](https://downloadmoreram.com/), tune [virtual memory](https://www.kernel.org/doc/Documentation/sysctl/vm.txt), use [zram](https://www.kernel.org/doc/Documentation/blockdev/zram.txt)/[zswap](https://www.kernel.org/doc/Documentation/vm/zswap.txt) and use [limits](https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html) for cgroups.
## Features ## Features