====== Технология cgroup ======

  * [[https://habrahabr.ru/company/selectel/blog/303190/|Механизмы контейнеризации: cgroups]] (сокращение от control groups, контрольные группы)
  * [[https://habr.com/ru/companies/redhatrussia/articles/423051/|Борьба за ресурсы, часть 1: Основы Cgroups]]

===== cgroup v2 =====

  * [[https://pavlokhmel.com/cgroup-v2-limit-memory-and-cpu-usage-for-all-users-on-linux.html|Cgroups v2 - limit memory and CPU usage for all users on Linux]]

<code>
# lssubsys -a

# systemd-cgls
/apache2

# cat /sys/fs/cgroup/system.slice/apache2.service/memory.high

# echo 2000000 > /sys/fs/cgroup/system.slice/apache2.service/memory.high

# time curl 127.0.0.1

# systemctl edit --force --full my.slice
</code><code>
[Unit]
Description=My Slice
Before=slices.target

[Slice]
MemoryAccounting=true
MemoryLimit=64M
MemoryHigh=64M
CPUAccounting=true
CPUQuota=5%
TasksMax=4096
</code><code>
# systemctl edit apache2.service
</code><code>
[Service]
Slice=my.slice
</code><code>
# systemctl daemon-reload

# systemctl restart apache2.service

# systemd-cgls
/apache2

# cat /sys/fs/cgroup/my.slice/memory.high
  
# cat /sys/fs/cgroup/my.slice/cpu.max
</code>
===== cgroup v1 (Debian10/Ubuntu20) =====

<code>
# ls /sys/fs/cgroup/

# mkdir /sys/fs/cgroup/memory/group0

# echo $$ > /sys/fs/cgroup/memory/group0/tasks

# echo 1M > /sys/fs/cgroup/memory/group0/memory.limit_in_bytes
  или
# echo 512K > /sys/fs/cgroup/memory/group0/memory.limit_in_bytes

# vim anyfile
</code>