做外单网站有哪些内容,服务好的南京网站建设,商品详情页图片,湘潭知名网站建设在高速网络传输中#xff0c;每秒传输的数据量非常大。网络设备设置有一种缓存机制#xff0c;即“缓存区”#xff0c;在 Linux 系统中#xff0c;网卡缓冲分为两种类型#xff1a;软件缓冲区和硬件缓冲区。 要提高网络吞吐率#xff0c;首先当然是升级linux kernel。其…在高速网络传输中每秒传输的数据量非常大。网络设备设置有一种缓存机制即“缓存区”在 Linux 系统中网卡缓冲分为两种类型软件缓冲区和硬件缓冲区。 要提高网络吞吐率首先当然是升级linux kernel。其次是设置linux系统参数和网卡驱动参数。 查看当前linux系统参数 $ cat /etc/sysctl.conf vm.swappiness 0 net.ipv4.neigh.default.gc_stale_time 120 # see details in https://help.aliyun.com/knowledge_detail/39428.html net.ipv4.conf.all.rp_filter 0 net.ipv4.conf.default.rp_filter 0 net.ipv4.conf.default.arp_announce 2 net.ipv4.conf.lo.arp_announce 2 net.ipv4.conf.all.arp_announce 2 # see details in https://help.aliyun.com/knowledge_detail/41334.html net.ipv4.tcp_max_tw_buckets 5000 net.ipv4.tcp_syncookies 1 net.ipv4.tcp_max_syn_backlog 1024 net.ipv4.tcp_synack_retries 2 net.ipv6.conf.all.disable_ipv6 1 net.ipv6.conf.default.disable_ipv6 1 net.ipv6.conf.lo.disable_ipv6 1 kernel.sysrq 1
可以设置为下面这一组优化后的系统参数 sysctl -w net.ipv4.tcp_tw_reuse1 sysctl -w net.ipv4.tcp_tw_recycle1 sysctl -w net.ipv4.tcp_fin_timeout30 sysctl -w net.ipv4.tcp_keepalive_time600 sysctl -w net.ipv4.tcp_max_syn_backlog8192 sysctl -w net.ipv4.tcp_max_tw_buckets5000 sysctl -w net.ipv4.ip_local_port_range1024 65000 sysctl -w net.ipv4.tcp_rmem4096 436600 873200 sysctl -w net.ipv6.conf.all.disable_ipv61 sysctl -w net.ipv6.conf.default.disable_ipv61 sysctl -w net.ipv4.tcp_synack_retries2 sysctl -w net.ipv4.tcp_syn_retries2 sysctl -w net.core.wmem_max16777216 sysctl -w net.core.wmem_default16777216 sysctl -w net.core.rmem_max16777216 sysctl -w net.core.rmem_default16777216 $ sysctl -p
网卡驱动一般情况下不允许设置但可以查询设置情况和统计信息以定位问题。 如果可能应该升级linux kernel和net driver(ko)以便获得更好的网络性能。 下面是一台典型centos7 VPS的网卡信息驱动较为简单。 rootiZj6c591g5r6irirqvcj5gZ ~/$ ethtool -i eth0 driver: virtio_net version: 1.0.0 firmware-version: expansion-rom-version: bus-info: 0000:00:03.0 supports-statistics: no supports-test: no supports-eeprom-access: no supports-register-dump: no supports-priv-flags: no rootiZj6c591g5r6irirqvcj5gZ ~/$ ethtool -g eth0 Ring parameters for eth0: Pre-set maximums: RX: 4096 RX Mini: 0 RX Jumbo: 0 TX: 4096 Current hardware settings: RX: 4096 RX Mini: 0 RX Jumbo: 0 TX: 4096
rootiZj6c591g5r6irirqvcj5gZ ~/$ ethtool -l eth0 Channel parameters for eth0: Pre-set maximums: RX: 0 TX: 0 Other: 0 Combined: 4 Current hardware settings: RX: 0 TX: 0 Other: 0 Combined: 4
下面的设置全部失败。 rootiZj6c591g5r6irirqvcj5gZ ~/ $ $ ethtool -L eth0 tx 8 rx 8 other 8 combined 8 $ ethtool -G eth0 rx 8192 tx 8192 $ ethtool -C eth0 adaptive-tx off
