vm.swappiness = 0 
net.ipv4.neigh.default.gc_stale_time = 120
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_synack_retries = 2
net.netfilter.nf_conntrack_max = 655350
net.netfilter.nf_conntrack_tcp_timeout_established = 1200
kernel.sysrq = 1 
kernel.hung_task_timeout_secs = 240 
kernel.panic_on_oops = 1 
kernel.hardlockup_panic = 1