swappiness

# exclude OOM killer situtation
vm.swappiness = 1
# how often we will drop dirty data to the disk
vm.dirty_ratio = 20
vm.dirty_background_ratio = 10
# how many data can be dirty, we assume you have no cache on the controller level, because LUN/FC adapter settings is not known
vm.dirty_background_bytes = 16777216
vm.dirty_bytes = 134217728