Hello all, i hope i added the right list and people - if i missed someone i would be happy to know. While using kernel 4.19.55 and cgroupv2 i set a MemoryHigh value for a varnish service. It happens that the varnish.service cgroup reaches it's MemoryHigh value and stops working due to throttling. But i don't understand is that the process itself only consumes 40% of it's cgroup usage. So the other 60% is dirty dentries and inode cache. If i issue an echo 3 > /proc/sys/vm/drop_caches the varnish cgroup memory usage drops to the 50% of the pure process. I thought that the kernel would trigger automatic memory reclaim if a cgroup reaches is memory high value to drop caches. Isn't it? does it needs a special flag or tuning? Is this expected? Before drop caches: Memory: 13.1G (high: 13.0G) After drop caches: Memory: 5.8G (high: 13.0G) Greets, Stefan
