diff --git a/sysctl.d/12309.conf b/sysctl.d/12309.conf
new file mode 100644
index 0000000..352f8a7
--- /dev/null
+++ b/sysctl.d/12309.conf
@@ -0,0 +1,24 @@
+# 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