禁用 SELINUX 
setenforce 0 
sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config 
getenforce 
修改为 DISABLE

关闭Transparent HugePages 
修改/etc/grub.conf文件，在Kernel行末尾加上下列参数： 
transparent_hugepage=never

IO调度算法调整 
修改/etc/grub.conf文件，在Kernel行末尾加上下列参数： 
elevator=deadline 
可以通过cat /sys/block/sda/queue/scheduler命令来查看目前调度算法。

配置服务 
service iptables stop 
service iptables save 
service ip6tables stop 
service ip6tables save 
chkconfig avahi-daemon off 
chkconfig bluetooth off 
chkconfig cpuspeed off 
chkconfig cups off 
chkconfig firstboot off 
chkconfig ip6tables off 
chkconfig iptables off 
chkconfig pcmcia off

内核参数修改 
cat>>/etc/sysctl.conf<<EOF 
kernel.shmmax = 54050481766 
kernel.shmall = 16494898 
kernel.shmmni = 4096 
kernel.sem = 250 32000 100 128 
fs.file-max = 6815744 
fs.aio-max-nr = 4194304 
net.ipv4.ip_local_port_range = 9000 65500 
net.core.rmem_default = 262144 
net.core.rmem_max = 4194304 
net.core.wmem_default = 262144 
net.core.wmem_max = 1048576 
net.ipv4.ipfrag_high_thresh = 16777216 
net.ipv4.ipfrag_low_thresh = 15728640 
kernel.randomize_va_space=0 
vm.min_free_kbytes = 524288 
# vm.nr_hugepages = 512 
EOF 
最佳配置算法: 
#shmmax 
echo "`cat /proc/meminfo | grep "MemTotal" | awk '{print $2}'` * 1024 * 0.8" | bc  | sed 's#\..*$##' 
#shmall 
echo "`cat /proc/meminfo | grep "MemTotal" | awk '{print $2}'` / (`getconf PAGESIZE` / 1024)" | bc 
使参数生效 
sysctl -p