feat：Linux网络内核参数调优

后端方向/Linux/Linux[内核网络参数调优].md

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+## 内核网络参数调优
+
+```ini
+# 内核参数调优
+net.core.rmem_default = 256960
+net.core.rmem_max = 513920
+net.core.wmem_default = 256960
+net.core.wmem_max = 513920
+net.core.netdev_max_backlog = 2000
+net.core.somaxconn = 2048
+net.core.optmem_max = 81920
+net.ipv4.tcp_mem = 131072  262144  524288
+net.ipv4.tcp_rmem = 8760  256960  4088000
+net.ipv4.tcp_wmem = 8760  256960  4088000
+net.ipv4.tcp_keepalive_time = 1800
+net.ipv4.tcp_keepalive_intvl = 30
+net.ipv4.tcp_keepalive_probes = 3
+net.ipv4.tcp_sack = 1
+net.ipv4.tcp_fack = 1
+net.ipv4.tcp_timestamps = 1
+net.ipv4.tcp_window_scaling = 1
+net.ipv4.tcp_syncookies = 1
+net.ipv4.tcp_tw_reuse = 1
+net.ipv4.tcp_fin_timeout = 30
+net.ipv4.ip_local_port_range = 1024  65000
+net.ipv4.tcp_max_syn_backlog = 2048
+# BBR
+net.core.default_qdisc=fq
+net.ipv4.tcp_congestion_control=bbr
+```