Redis 机器内核参数优化

echo "" > /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 ==  ];then

　　echo "kernel_veriosn:" $centos_kernel

　　sysctl -w vm.swappiness=

　　cat /etc/sysctl.conf | grep 'vm.swappiness='

　　if [ $? == "" ];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 ==  ];then

　　echo "kernel_veriosn:" $centos_kernel

　　sysctl -w vm.swappiness=

　　cat /etc/sysctl.conf | grep vm.swappiness=

　　if [ $? == "" ];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

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='