Redis 机器内核参数优化

echo "1" > /proc/sys/vm/overcommit_memory
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
centos_kernel=`uname -r | awk -F "." '{print $1$2}'`
if [ $centos_kernel == 26 ];then
　　echo "kernel_veriosn:" $centos_kernel
　　sysctl -w vm.swappiness=0
　　cat /etc/sysctl.conf | grep 'vm.swappiness='
　　if [ $? == "0" ];then
　　　　sed -i 's/^vm.swappiness.*//g' /etc/sysctl.conf
　　　　echo 'vm.swappiness=0' >> /etc/sysctl.conf
　　　　sed -i '/^$/d' /etc/sysctl.conf
　　else
　　　　echo 'vm.swappiness=0' >> /etc/sysctl.conf
　　fi
elif [ $centos_kernel == 310 ];then
　　echo "kernel_veriosn:" $centos_kernel
　　sysctl -w vm.swappiness=1
　　cat /etc/sysctl.conf | grep vm.swappiness=
　　if [ $? == "0" ];then
　　　　sed -i 's/^vm.swappiness.*//g' /etc/sysctl.conf
　　　　echo 'vm.swappiness=1' >> /etc/sysctl.conf
　　　　sed -i '/^$/d' /etc/sysctl.conf
　　else
　　　　echo 'vm.swappiness=1' >> /etc/sysctl.conf
　　fi
else
　　echo "kernel_veriosn:" $centos_kernel
　　exit 1
fi
over_memory=`cat /proc/sys/vm/overcommit_memory`
echo "overcommit_memory:" $over_memory
defrag=`cat /sys/kernel/mm/transparent_hugepage/defrag`
echo "defrag:" $defrag
cat /etc/sysctl.conf | grep 'vm.swappiness='