继续上文CentOS6.5 Nginx优化编译配置本文记录有关Nginx系统环境的一些细节设置，有关Nginx性能调整除了配置文件吻合服务器硬件之前就是关闭不必要的服务、磁盘操作、文件描述符、内核调整等。
1、关闭系统中不需要的服务
###Centos minimal 本来就是最小安装，这里我也就不提建议了，跟着自己的环境来###[root@i-it ~]# chkconfig --list auditd 0:off 1:off 2:on 3:on 4:on 5:on 6:off blk-availability 0:off 1:on 2:on 3:on 4:on 5:on 6:off crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off ip6tables 0:off 1:off 2:on 3:on 4:on 5:on 6:off iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off iscsi 0:off 1:off 2:off 3:on 4:on 5:on 6:off iscsid 0:off 1:off 2:off 3:on 4:on 5:on 6:off lvm2-monitor 0:off 1:on 2:on 3:on 4:on 5:on 6:off mdmonitor 0:off 1:off 2:on 3:on 4:on 5:on 6:off multipathd 0:off 1:off 2:off 3:off 4:off 5:off 6:off netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off netfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off network 0:off 1:off 2:on 3:on 4:on 5:on 6:off nginx 0:off 1:off 2:on 3:on 4:on 5:on 6:off postfix 0:off 1:off 2:on 3:on 4:on 5:on 6:off rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off restorecond 0:off 1:off 2:off 3:off 4:off 5:off 6:off rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off saslauthd 0:off 1:off 2:off 3:off 4:off 5:off 6:off sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off udev-post 0:off 1:on 2:on 3:on 4:on 5:on 6:off
2、清除文件描述符
###建议先备份一下###[root@i-it ~]# ll /software/nginx/sbin/nginx -h -rwxr-xr-x.1 root root 2.9MJun800:02/software/nginx/sbin/nginx [root@i-it ~]# strip /software/nginx/sbin/nginx [root@i-it ~]# ll /software/nginx/sbin/nginx -h -rwxr-xr-x.1 root root 2.6MJun801:54/software/nginx/sbin/nginx
2、优化写磁盘操作
####重新挂载当前分区，不记录Nginx对文件访问的时间修改#### mount -o defaults,noatime,nodiratime -o remount /dev/sda1
3、优化文件描述符
####修改配置文件####[root@i-it ~]# egrep -v "^#|^$"/etc/security/limits.conf *- nofile 65535*- nproc 65535[root@i-it ~]# su -[root@i-it ~]# ulimit -u 65535[root@i-it ~]# ulimit -n 65535
4、优化内核参数
[root@i-it ~]# cat >/etc/sysctl.conf<
