# swap usage (default = 60)
vm.swappiness = 5
# (default = 100)
vm.vfs_cache_pressure = 1000

# http://www.linux.org.ru/wiki/en/User:shimon/12309
# reduce memory size allowed to process (default = 0 )
vm.overcommit_memory = 1
# memory allowed to process: total_swap + total_ram * overcommit_ratio / 100 (default = 50 )
#vm.overcommit_ratio = 12
# disk buffer size (default = 0 )
vm.dirty_bytes = 16777216
# disk buffer size (default = 0 )
vm.dirty_background_bytes = 4194304
# For old kernels <2.6.30 (default = 40)
#vm.dirty_ratio = 12
# For old kernels <2.6.30 (default = 10)
#vm.dirty_background_ratio = 3
# https://github.com/zen-kernel/zen-kernel/issues/81#issuecomment-260779930
vm.dirty_expire_centisecs = 800
vm.dirty_writeback_centisecs = 500