1.vim /etc/sysctl.conf
修改
kernel.msgmnb = 655360
kernel.msgmax = 655360
net.core.somaxconn = 10240
增加以下数据
net.ipv4.ip_conntrack_max = 200000
fs.file-max = 1048576
net.ipv4.ip_local_port_range = 1024 65535
net.ipv4.tcp_mem = 786432 2097152 3145728
net.ipv4.tcp_rmem = 4096 4096 16777216
net.ipv4.tcp_wmem = 4096 4096 16777216
2.增加以下数据
vim /etc/security/limits.conf
* soft nofile 10240
* hard nofile 10240
3.增加以下数据
vim /etc/rc.local
ulimit -HSn 655360
4.执行命令
ulimit -n 655360
--------------------------------------------------------------
暂时笔记这样记录，因为有时候很蛋疼，这样的记录也不成功。
这个比较是成功后，在里面找出来的不同
后续找到规律再进行修改
在一次偶然机会，复制了一份之前在其它服务器上配置过的sysctl.conf文件
然后使之生效sysctl.conf -p 就成功了
在sysctl.conf 里尽量把值增大一点，
硬链接这样修改 把值再增大一点
echo 10485760 > /proc/sys/fs/file-max
软连接可以这样修改
ulimit -n 655360 -------------暂且认为是软连接数的意思
先执行sysctl -p
后再去执行ulimit -n 655360
-------------------------------------------------
也可以试着ulimt -n 100,ulimit -n 1000,ulimit -n 60000,ulimit -n 600000.，一步一步的增加引诱
发现新大陆
只需要在/etc/security/limit.conf中
添加
* soft nofile 900000
* hard nofile 900000
ulimit -n 655360 这个数据只正针对于当前打开的窗口有效，另起窗口，则失效
然后再重新打开一个窗口，查看ulimit -n的值，是否为永久生效
1 # Kernel sysctl configuration file for Red Hat Linux 2 # 3 # For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and 4 # sysctl.conf(5) for more details. 5 6 # Controls IP packet forwarding 7 net.ipv4.ip_forward = 0 8 9 # Controls source route verification 10 net.ipv4.conf.default.rp_filter = 1 11 #net.ipv4.conf_conntrack_max = 100000 12 13 #net.ipv4.ip_local_port_range = 1024 65000 14 15 # Do not accept source routing 16 net.ipv4.conf.default.accept_source_route = 0 17 18 # Controls the System Request debugging functionality of the kernel 19 kernel.sysrq = 0 20 21 # Controls whether core dumps will append the PID to the core filename. 22 # Useful for debugging multi-threaded applications. 23 kernel.core_uses_pid = 1 24 25 # Controls the use of TCP syncookies 26 27 net.ipv4.conf.default.rp_filter = 1 28 #net.ipv4.conf_conntrack_max = 100000 29 30 #net.ipv4.ip_local_port_range = 1024 65000 31 32 # Do not accept source routing 33 net.ipv4.conf.default.accept_source_route = 0 34 35 # Controls the System Request debugging functionality of the kernel 36 kernel.sysrq = 0 37 38 # Controls whether core dumps will append the PID to the core filename. 39 # Useful for debugging multi-threaded applications. 40 kernel.core_uses_pid = 1 41 42 # Controls the use of TCP syncookies 43 net.ipv4.tcp_syncookies = 1 44 45 # Disable netfilter on bridges. 46 net.bridge.bridge-nf-call-ip6tables = 0 47 net.bridge.bridge-nf-call-iptables = 0 48 net.bridge.bridge-nf-call-arptables = 0 49 50 # Controls the default maxmimum size of a mesage queue 51 kernel.msgmnb = 655360 52 53 # Controls the maximum size of a message, in bytes 54 kernel.msgmax = 655360 55 56 # Controls the maximum shared segment size, in bytes 57 kernel.shmmax = 68719476736 58 59 # Controls the maximum number of shared memory segments, in pages 60 kernel.shmall = 4294967296 61 net.core.somaxconn = 10240