Created attachment 112251 [details] atop view Hi! I'm using up-to-date archlinux with btrfs(on non-root partition) on small home server. Before, when i'm used ext4, all was well. Sometimes(about two times a week) server hangs and stops responding to any request, except ping. Ports remain opened, but even sshd didn't send banner. Server's casing is hot (i'm assume high cpu usage). I'm grabbed snapshot with atop (see attach). This looks like server runs out of memory although just several percents used by applications. I see a lot of btrfs processes in list. $ btrfs --version Btrfs v0.20-rc1-358-g194aa4a kernel: 3.11.4-1-ARCH Mount with: /dev/sda7 /mnt/stor btrfs rw,noatime,compress=lzo,space_cache 0 0 Excuse me for my poor english.
So it looks like the kernel isn't using much memory, just ~300mb for page cache and ~25mb for slab, so this isn't a btrfs issue, you probably have a misbehaving application that is driving you into swap for some reason.