The weird interactions of cgroups and linux page cache in hypervisor environments

The weird interactions of cgroups and linux page cache in hypervisor environments

Vasil Kolev Blog Leave a Comment

Here’s one case we’ve spent some time debugging, related to StorPool, VMs, cgroups, OOM (out-of-memory) killer and caching. Some of it should be useful to a lot of sysadmins out there. The issue started with a customer complaining: > It’s happening again, on this hypervisor VMs are being killed > by the OOM killer. This doesn’t happen on hypervisors where …