A example for Memory limit with Linux CGgroup in Go.
- add
climitsmemory group
$ mount | grep memory
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
$ mkdir /sys/fs/cgroup/memory/climits
When climits created, the default config will auto create, command ls /sys/fs/cgroup/memory/climits output will be:
cgroup.clone_children memory.kmem.limit_in_bytes memory.kmem.tcp.usage_in_bytes memory.memsw.max_usage_in_bytes memory.soft_limit_in_bytes tasks
cgroup.event_control memory.kmem.max_usage_in_bytes memory.kmem.usage_in_bytes memory.memsw.usage_in_bytes memory.stat
cgroup.procs memory.kmem.slabinfo memory.limit_in_bytes memory.move_charge_at_immigrate memory.swappiness
memory.failcnt memory.kmem.tcp.failcnt memory.max_usage_in_bytes memory.numa_stat memory.usage_in_bytes
memory.force_empty memory.kmem.tcp.limit_in_bytes memory.memsw.failcnt memory.oom_control memory.use_hierarchy
memory.kmem.failcnt memory.kmem.tcp.max_usage_in_bytes memory.memsw.limit_in_bytes memory.pressure_level notify_on_release
- run command
./climit -memory=64, the output is:
add pid 24059 to file cgroup.procs
Child pid is 24059
Alloc = 1 MiB Sys = 66 MiB
Alloc = 3 MiB Sys = 68 MiB
Alloc = 7 MiB Sys = 68 MiB
....
Alloc = 32 MiB Sys = 134 MiB
Alloc = 32 MiB Sys = 134 MiB
Alloc = 32 MiB Sys = 134 MiB
cmd return with error: signal: killed
app is killed by system
restart app..
add pid 24135 to file cgroup.procs
Child pid is 24135
Alloc = 1 MiB Sys = 66 MiB
Alloc = 3 MiB Sys = 68 MiB
Alloc = 7 MiB Sys = 68 MiB
- memory limit
- process restart