sysctl.conf

linux-init-script/sysctl_centos6.conf.sh

@@ -0,0 +1,45 @@
+
+# /etc/sysctl.conf
+cat >>/etc/sysctl.conf<<EOF
+net.ipv4.netfilter.ip_conntrack_max = 131072
+net.ipv4.tcp_max_tw_buckets = 60000
+net.ipv4.tcp_sack = 1
+net.ipv4.tcp_window_scaling = 1
+net.ipv4.tcp_rmem = 4096        87380   4194304
+net.ipv4.tcp_wmem = 4096        16384   4194304
+
+net.ipv4.tcp_max_syn_backlog = 65536
+net.core.netdev_max_backlog =  32768
+net.core.somaxconn = 32768
+
+net.core.wmem_default = 8388608
+net.core.rmem_default = 8388608
+net.core.rmem_max = 16777216
+net.core.wmem_max = 16777216
+
+net.ipv4.tcp_timestamps = 0
+net.ipv4.tcp_synack_retries = 2
+net.ipv4.tcp_syn_retries = 2
+
+net.ipv4.tcp_tw_recycle = 1
+net.ipv4.tcp_tw_reuse = 1
+
+net.ipv4.tcp_mem = 94500000 915000000 927000000
+net.ipv4.tcp_max_orphans = 3276800
+
+net.ipv4.tcp_tw_recycle = 1
+net.ipv4.tcp_fin_timeout = 10
+
+net.ipv4.tcp_keepalive_time = 120
+net.ipv4.tcp_keepalive_probes = 5
+net.ipv4.tcp_keepalive_intvl = 15
+
+net.ipv4.ip_local_port_range = 1024    65000
+
+net.nf_conntrack_max = 6553500
+net.netfilter.nf_conntrack_max = 6553500
+net.netfilter.nf_conntrack_tcp_timeout_established = 180
+net.netfilter.nf_conntrack_tcp_timeout_last_ack = 3
+
+EOF
+

linux-init-script/sysctl_centos7.conf.sh

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+
+# /etc/sysctl.conf
+cat >>/etc/sysctl.conf<<EOF
+net.ipv6.conf.all.disable_ipv6 = 1
+net.ipv6.conf.default.disable_ipv6 = 1
+net.ipv4.tcp_syn_retries = 1
+net.ipv4.tcp_synack_retries = 1
+net.ipv4.tcp_keepalive_time = 600
+net.ipv4.tcp_keepalive_probes = 3
+net.ipv4.tcp_keepalive_intvl =15
+net.ipv4.tcp_retries2 = 5
+net.ipv4.tcp_fin_timeout = 5
+net.ipv4.tcp_max_tw_buckets = 60000
+net.ipv4.tcp_tw_recycle = 1
+net.ipv4.tcp_tw_reuse = 1
+net.ipv4.tcp_max_orphans = 32768
+net.ipv4.tcp_syncookies = 1
+net.ipv4.tcp_max_syn_backlog = 16384
+net.ipv4.tcp_wmem = 51200 131072 204800
+net.ipv4.tcp_rmem = 51200 131072 204800
+net.ipv4.ip_local_port_range = 1024 65000
+net.core.somaxconn = 16384
+net.core.netdev_max_backlog = 16384
+vm.overcommit_memory = 1
+net.nf_conntrack_max = 6553500
+net.netfilter.nf_conntrack_max = 6553500
+net.netfilter.nf_conntrack_tcp_timeout_established = 180
+EOF
+