Hi Hervé,
Thank you for your answer, it helps figuring out.
Yes, we also use jemalloc.
When you say 2.9M, you mean total by node, not by FS, right ?
Our FST handles 30M files by node, so around 10 times more. RSS can be also less than 22GB size (starts at 10GB), but also much more (120GB max, currently)
eos version is 4.2.20, kernel version is almost the same as yours (862.3.2)
Maybe RSS size is not meant to be proportional to handled files, but more to file usage.
I’ll keep on monitoring, especially after we upgrade the FST versions.