On Mon 05-04-21 11:18:48, Bharata B Rao wrote: > Hi, > > When running 10000 (more-or-less-empty-)containers on a bare-metal Power9 > server(160 CPUs, 2 NUMA nodes, 256G memory), it is seen that memory > consumption increases quite a lot (around 172G) when the containers are > running. Most of it comes from slab (149G) and within slab, the majority of > it comes from kmalloc-32 cache (102G) Is this 10k cgroups a testing enviroment or does anybody really use that in production? I would be really curious to hear how that behaves when those containers are not idle. E.g. global memory reclaim iterating over 10k memcgs will likely be very visible. I do remember playing with similar setups few years back and the overhead was very high. -- Michal Hocko SUSE Labs
