TLDR;
According to this pull-request set vm.dirty_bytes to 268435456 and vm.dirty_background_bytes to 134217728 which is same as 256 Mb and 128 Mb.
I never had any issue on
Sorry at first being some kind of click-bait title but I have not find a proper
way to open this post. From the last article I wrote about how DuckDuckGo
changed their policy