linux sysctl参数配置详细介绍

linux sysctl参数配置

步骤及实现：

sudo vi /etc/sysctl.conf

代码：

# 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

重启,使修改生效

sudo sysctl -p 

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