# by http://linuxoidblog.blogspot.ru/2015/06/12309.html

# limit maximum alloc size.
vm.overcommit_memory=2
vm.overcommit_ratio=60
#limit write buffer for fine-grained copying
vm.dirty_bytes=2097152
vm.dirty_background_bytes=2097152
# start swapping when memory 80% full
vm.swappiness=80
#filesystem cache more important than file cache
vm.vfs_cache_pressure=50