容器进程因io导致cacheMemory较高处理随记

就好像harbor的registry容器，因为经常有io，所以比较容易触发这种现象。

或者频繁追加写日志到文件的进程，也会触发这种现象

如果是cgroup2，就可以用cgroup2 的memory.high处理。找到相应的cgroup2路径，配置memory.high即可

以harbor为例

nerdctl ps | awk '/registry-photon/{print "nerdctl inspect --mode native -f \"{{json .Spec.linux.cgroupsPath}}\" "$1}' | sh |cut -c 2-|cut -c -144|awk 'BEGIN{FS=":"};{print "cat /sys/fs/cgroup/kubepods.slice/kubepods-burstable.slice/"$1"/"$2"-"$3".scope/memory.high"}'


nerdctl ps | awk '/registry-photon/{print "nerdctl inspect --mode native -f \"{{json .Spec.linux.cgroupsPath}}\" "$1}' | sh |cut -c 2-|cut -c -144|awk 'BEGIN{FS=":"};{print "echo 2G >  /sys/fs/cgroup/kubepods.slice/kubepods-burstable.slice/"$1"/"$2"-"$3".scope/memory.high"}'