转自：http://linux.it.net.cn/CentOS/operation/2015/0117/12081.html?

1. 开发最大文件数 IT网.cn，http://www.it.net.cn

修改/etc/security/limits.conf文件，在文件中加入

<span style="font-size:18px;">* soft nofile 65536  
* hard nofile 65536 </span>

  IT网

开放最大文件数到65536

 

2.调优内核网络配置

修改/etc/sysctl.conf，在文件中加入

 

<span style="font-size:18px;">kernel.shmall = 268435456  
net.ipv4.tcp_syncookies = 1  
net.ipv4.tcp_tw_reuse = 1  
net.ipv4.tcp_tw_recycle = 1  
net.ipv4.tcp_fin_timeout = 30  
net.ipv4.tcp_keepalive_time = 1200  
net.ipv4.ip_local_port_range = 1024 65000  
net.ipv4.tcp_max_tw_buckets = 5000  
net.ipv4.tcp_max_tw_buckets = 5000  
net.ipv4.tcp_fin_timeout = 30  
net.ipv4.tcp_keepalive_time = 300  
net.ipv4.tcp_syncookies = 1  
net.ipv4.tcp_tw_reuse = 1  
net.ipv4.tcp_tw_recycle = 1  
net.ipv4.ip_local_port_range = 5000 65000  
net.ipv4.tcp_mem = 786432 1048576 1572864  
net.core.wmem_max = 873200  
net.core.rmem_max = 873200  
net.ipv4.tcp_wmem = 8192 436600 873200  
net.ipv4.tcp_rmem = 32768 436600 873200  
net.core.somaxconn = 256  
net.core.netdev_max_backlog = 1000  
net.ipv4.tcp_max_syn_backlog = 2048  
net.ipv4.tcp_retries2 = 5  
net.ipv4.tcp_keepalive_time = 500  
net.ipv4.tcp_keepalive_intvl = 30  
net.ipv4.tcp_keepalive_probes = 3  
net.ipv4.conf.lo.arp_ignore = 0  
net.ipv4.conf.lo.arp_announce = 0  
net.ipv4.conf.all.arp_ignore = 0  
net.ipv4.conf.all.arp_announce = 0 </span>

优化网络连接等网络参数，主要参数解释如下   修改完之后运行sudo sysctl -p使系统立即生效。

 

3.删掉MariaDB的配置文件 Linux学

系统默认会在/etc目录存放一个my.cnf文件

  Linux学习，http:// l

4.开放80端口