网上关于sysctl.conf的优化方案有各种版本，大多都是抄来抄去的，让新人看了很迷茫。
前言 记得第一次接触/etc/security/limits.conf和/etc/sysctl.conf时 是因为部署Oracle时要按需修改内核参数。...limits.conf 和sysctl.conf区别在于limits.conf是针对用户，而sysctl.conf是针对整个系统参数配置。...调整limits.conf和sysctl.conf参数是有必要的 更新历史 2015年08月10日 - 初稿 阅读原文 - http://wsgzao.github.io/post/sysctl/ 扩展阅读...设置Sysctl.conf用以提高Linux的性能(最完整的sysctl.conf优化方案) - http://blog.csdn.net/21aspnet/article/details/6584792...sysctl.conf工作原理 sysctl命令被用于在内核运行时动态地修改内核的运行参数，可用的内核参数在目录/proc/sys中。
greenplum 常用的配置参数 1、参数列表 2、参数含义解释 greenplum 常用的配置参数 1、参数列表 # cat /etc/sysctl.conf kernel.shmmax = 1800000000000
注:OS的内核参数大多数存放在/proc/sys目录下，可以在系统运行时进行更改，但是当系统重新启动时会失效，而通过/etc/sysctl.conf文件可以永久生效修改后的内核参数。...sysctl -p 该命令可以立即生效sysctl.conf中配置的内核参数。...如下为安装部署Oracle时需要配置的内核参数： cat /etc/sysctl.conf kernel.shmall 4294967296 kernel.shmmax 270914289664 vm.min_free_kbyte
= 16777216” >> /etc/sysctl.conf echo -e “net.ipv4.route.max_size = 5242880” >> /etc/sysctl.conf echo...65535” >> /etc/sysctl.conf echo -e “net.ipv4.tcp_retries2 = 5” >> /etc/sysctl.conf echo -e “net.ipv4....tcp_fin_timeout = 30” >> /etc/sysctl.conf echo -e “net.ipv4.tcp_syn_retries = 3” >> /etc/sysctl.conf...= 262144” >> /etc/sysctl.conf echo -e “net.core.wmem_default = 8388608” >> /etc/sysctl.conf echo -e...= 5242880” >> /etc/sysctl.conf echo -e “net.ipv4.route.gc_timeout = 20” >> /etc/sysctl.conf echo -e
= 8388608" >> /etc/sysctl.conf echo -e "net.core.rmem_max = 16777216" >> /etc/sysctl.conf echo -e...= 1" >> /etc/sysctl.conf echo -e "net.ipv4.tcp_timestamps = 0" >> /etc/sysctl.conf echo -e "net.ipv4....tcp_tw_recycle = 1" >> /etc/sysctl.conf echo -e "net.ipv4.tcp_tw_len = 1" >> /etc/sysctl.conf echo...= 15" >> /etc/sysctl.conf echo -e "net.ipv4.tcp_max_tw_buckets = 36000" >> /etc/sysctl.conf echo -..." >> /etc/sysctl.conf echo -e "net.ipv4.tcp_wmem = 8192 131072 16777216" >> /etc/sysctl.conf echo -
= 0 ] ;then echo "net.ipv4.conf_all.rp_filter=1" >>/etc/sysctl.conf fi egrep -v "^#|^$" /etc/sysctl.conf...= 0 ] ;then echo "net.ipv4.tcp_syncookies=1" >>/etc/sysctl.conf fi egrep -v "^#|^$" /etc/sysctl.conf|...= 0 ] ;then echo "net.ipv4.ip_forward=0" >>/etc/sysctl.conf fi egrep -v "^#|^$" /etc/sysctl.conf|egrep...= 0 ] ;then echo "net.ipv4.icmp_echo_ignore_broadcasts=1" >>/etc/sysctl.conf fi sysctl -p /etc/sysctl.conf...chown root:root /etc/sysctl.conf chmod 600 /etc/sysctl.conf 脚本转自： http://www.linuxde.net/2011/12/5756
方法 1、（推荐） 先用命令 ifconfig 查看网卡信息，如 lo eth0 enp0s3，然后一个一个禁用 echo "#disable ipv6" | sudo tee -a /etc/sysctl.conf...echo "net.ipv6.conf.all.disable_ipv6 = 1" | sudo tee -a /etc/sysctl.conf echo "net.ipv6.conf.default.disable_ipv6...= 1" | sudo tee -a /etc/sysctl.conf echo "net.ipv6.conf.lo.disable_ipv6 = 1" | sudo tee -a /etc/sysctl.conf...echo "net.ipv6.conf.eth0.disable_ipv6 = 1" | sudo tee -a /etc/sysctl.conf 也可直接编辑配置文件 sudo vim /etc/sysctl.conf
default allow|deny ufw 相关的文件和文件夹 文件位置 说明 /etc /ufw/ 里面是一些ufw的环境设定文件，如 before.rules、after.rules、sysctl.conf.../etc/sysctl.conf 若开启ufw之 后，/etc/ufw/sysctl.conf会覆盖默认的/etc/sysctl.conf文件，若你原来的/etc/sysctl.conf做了修 改，启动...ufw后，若/etc/ufw/sysctl.conf中有新赋值，则会覆盖/etc/sysctl.conf的，否则还以/etc /sysctl.conf为准。
centos8 echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf echo "net.ipv4.tcp_congestion_control=bbr..." >> /etc/sysctl.conf sysctl -p sysctl -n net.ipv4.tcp_congestion_control lsmod | grep bbr Ubuntu 20.04...echo net.core.default_qdisc=fq >> /etc/sysctl.conf echo net.ipv4.tcp_congestion_control=bbr >> /etc/...sysctl.conf sysctl -p sysctl net.ipv4.tcp_available_congestion_control lsmod | grep bbr Debian10 echo...net.core.default_qdisc=fq >> /etc/sysctl.conf echo net.ipv4.tcp_congestion_control=bbr >> /etc/sysctl.conf
/d' /etc/sysctl.conf sudo sed -i '/net.ipv4.ip_forward/d' /etc/sysctl.conf sudo sed -i '/net.ipv4.tcp_tw_recycle.../d' /etc/sysctl.conf sudo sed -i '/vm.swappiness/d' /etc/sysctl.conf sudo sed -i '/vm.overcommit_memory.../d' /etc/sysctl.conf sudo sed -i '/vm.panic_on_oom/d' /etc/sysctl.conf sudo sed -i '/fs.inotify.max_user_watches.../d' /etc/sysctl.conf sudo sed -i '/fs.file-max/d' /etc/sysctl.conf sudo sed -i '/fs.nr_open/d' /etc.../sysctl.conf sudo sed -i '/net.ipv6.conf.all.disable_ipv6/d' /etc/sysctl.conf sudo sed -i '/net.netfilter.nf_conntrack_max
The sysctl utility’s configuration file, /etc/sysctl.conf, should be used to permanently store non-default...Syntax # vi /etc/sysctl.conf [component]....[parameter]=[value] Following is a sample /etc/sysctl.conf file: # grep -v ^# /etc/sysctl.conf net.ipv4...with the ‘-p‘ argument e.g.: # sysctl -n kernel.ctrl-alt-del 0 # echo "kernel.ctrl-alt-del=1" >> /etc/sysctl.conf...# sysctl -p kernel.ctrl-alt-del = 1 Modifying kernel parameters by adding them to the /etc/sysctl.conf
ufw相关的文件和文件夹有： /etc /ufw/：里面是一些ufw的环境设定文件，如 before.rules、after.rules、sysctl.conf、ufw.conf，及 for ip6 的...若开启ufw之 后，/etc/ufw/sysctl.conf会覆盖默认的/etc/sysctl.conf文件，若你原来的/etc/sysctl.conf做了修 改，启动ufw后，若/etc/ufw/sysctl.conf...中有新赋值，则会覆盖/etc/sysctl.conf的，否则还以/etc /sysctl.conf为准。
/sysctl.conf echo "net.bridge.bridge-nf-call-ip6tables = 1" >> /etc/sysctl.conf echo "net.bridge.bridge-nf-call-iptables...= 1" >> /etc/sysctl.conf echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf echo "net.ipv6...sysctl.conf echo "net.ipv6.conf.all.forwarding = 1" >> /etc/sysctl.conf # 执行命令以应用 sysctl -p 执行如下命令赋予...= 1" >> /etc/sysctl.conf echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf echo "net.ipv6...sysctl.conf echo "net.ipv6.conf.all.forwarding = 1" >> /etc/sysctl.conf # 执行命令以应用 sysctl -p # 配置K8S
可以通过修改 /etc/sysctl.conf 使更改永久化。 永久设置： 可以通过修改 /etc/sysctl.conf 使更改永久化。 ...shmmax 您还可以使用 sysctl 命令来更改 SHMMAX 的值： # sysctl -w kernel.shmmax=2147483648 最后，通过将该内核参数插入到 /etc/sysctl.conf...启动文件中，您可以使这种更改永久有效： # echo "kernel.shmmax=2147483648" >> /etc/sysctl.conf 2.设置消息队列的长度 /etc/sysctl.conf
*|net.ipv4.ip_forward = 1|g" /etc/sysctl.conf || echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf...>> /etc/sysctl.conf egrep -q "^(#)?...> /etc/sysctl.conf egrep -q "^(#)?...> /etc/sysctl.conf egrep -q "^(#)?...> /etc/sysctl.conf egrep -q "^(#)?
proc/sys/net/ipv4/icmp_echo_ignore_all [root@www ~]# echo”net.ipv4.icmp_echo_ignore_all=1” >> /etc/sysctl.conf...[root@www ~]# tail -1 /etc/sysctl.conf net.ipv4.icmp_echo_ignore_all=1 [root@www ~]# sysctl -p...生效： [root@www ~]# echo”net.ipv4.icmp_echo_ignore_all=1” >> /etc/sysctl.conf [root@www ~]# tail -...1 /etc/sysctl.conf net.ipv4.icmp_echo_ignore_all=1 [root@www ~]# sysctl -p 还原禁ping： echo 0 >/proc
系统参数， echo "fs.aio-max-nr = 1048576" >> /etc/sysctl.conf echo "fs.file-max = 6815744" >> /etc/sysctl.conf...echo "kernel.shmmni = 4096" >> /etc/sysctl.conf echo "kernel.sem = 250 32000 100 128" >> /etc/...sysctl.conf echo "net.ipv4.ip_local_port_range = 9000 65500" >> /etc/sysctl.conf echo "net.core.rmem_default...= 262144" >> /etc/sysctl.conf echo "net.core.rmem_max = 4194304" >> /etc/sysctl.conf echo "net.core.wmem_default...= 262144" >> /etc/sysctl.conf echo "net.core.wmem_max = 1048576" >> /etc/sysctl.conf sysctl -
security/limits.d/90-nproc.conf 修改如下内容： * soft nproc 1024 #修改为 * soft nproc 4096 第三条错误需要切换到root用户修改配置sysctl.conf...vi /etc/sysctl.conf 添加下面配置： vm.max_map_count=655360 并执行命令： sysctl -p 然后，重新启动elasticsearch，即可启动成功。...、max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] 修改/etc/sysctl.conf...配置文件， cat /etc/sysctl.conf | grep max_map_count 如果不存在则添加 echo "vm.max_map_count=655360" >>/etc/sysctl.conf
/etc/sysctl.conf.bak echo "#oracle" >> /etc/sysctl.conf echo "kernel.shmmni = 4096" >> /etc/sysctl.conf...echo "fs.aio-max-nr = 1048576" >> /etc/sysctl.conf echo "fs.file-max = 6815744" >> /etc/sysctl.conf..." >> /etc/sysctl.conf echo "net.core.rmem_default = 262144" >> /etc/sysctl.conf echo "net.core.rmem_max...= 4194304" >> /etc/sysctl.conf echo "net.core.wmem_default = 262144" >> /etc/sysctl.conf echo "net.core.wmem_max...= 1048586" >> /etc/sysctl.conf echo "vm.swappiness = 10" >> /etc/sysctl.conf echo "kernel.shmmax= $(
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