linux sysctl参数配置详细介绍

  sudo vi /etc/sysctl.conf

  # Kernel sysctl configuration file for Red Hat Linux  #  # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and  # sysctl.conf(5) for more details.          # Controls the System Request debugging functionality of the kernel  kernel.sysrq = 1    # Controls whether core dumps will append the PID to the core filename  # Useful for debugging multi-threaded applications  kernel.core_uses_pid = 1      # Controls the maximum size of a message, in bytes  kernel.msgmnb = 65536    # Controls the default maxmimum size of a mesage queue  kernel.msgmax = 65536    # Controls the maximum shared segment size, in bytes  kernel.shmmax = 68719476736    # Controls the maximum number of shared memory segments, in pages  kernel.shmall = 4294967296      # Controls IP packet forwarding  net.ipv4.ip_forward = 0  # Controls source route verification  net.ipv4.conf.default.rp_filter = 1  # Do not accept source routing  net.ipv4.conf.default.accept_source_route = 0    # Controls the use of TCP syncookies  net.ipv4.tcp_syncookies = 1  net.core.somaxconn = 10240  net.ipv4.tcp_tw_reuse = 1  net.ipv4.tcp_tw_recycle = 1  net.ipv4.tcp_fin_timeout = 30  net.ipv4.tcp_keepalive_time = 300  net.ipv4.tcp_synack_retries = 3  net.ipv4.tcp_syn_retries = 3  net.core.rmem_max = 16777216  net.core.wmem_max = 16777216  net.ipv4.tcp_rmem = 4096 87380 16777216  net.ipv4.tcp_wmem = 4096 65536 16777216  net.ipv4.tcp_no_metrics_save = 0  net.core.netdev_max_backlog = 2500  net.ipv4.tcp_max_syn_backlog = 4196  net.ipv6.conf.all.disable_ipv6 = 1  net.ipv6.conf.default.disable_ipv6 = 1                      xen.independent_wallclock = 1    

  sudo sysctl -p