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

# http://www.linux.org.ru/wiki/en/User:shimon/12309
# reduce memory size allowed to process (default = 0 )
vm.overcommit_memory = 2
# memory allowed to process: total_swap + total_ram * overcommit_ratio / 100 (default = 50 )
vm.overcommit_ratio = 80
# disk buffer size (default = 0 )
vm.dirty_bytes = 2097152
# disk buffer size (default = 0 )
vm.dirty_background_bytes = 2097152
# (default = 100)
vm.vfs_cache_pressure = 50
# For old kernels <2.6.30 (default = 40)
#vm.dirty_ratio = 3
# For old kernels <2.6.30 (default = 10)
#vm.dirty_background_ratio = 3

# -- more 12309 tricks --
# (default = 3000)
vm.dirty_expire_centisecs =  1000
# (default = 500)
vm.dirty_writeback_centisecs = 200