docker images update

packer/ansible/roles/node/templates/sysctl.j2

@@ -66,6 +66,9 @@
 # for what other values do
 #kernel.sysrq=438
 
+vm.dirty_background_ratio = 5
+vm.dirty_ratio = 80
+
 net.core.default_qdisc = fq
 net.core.rmem_max = 268435456
 net.core.wmem_max = 268435456