mongodb限制内存和安装

# engine: mmapv1: smallFiles: true wiredTiger: engineConfig: configString : cache_size=512M

echo "deb [ arch=amd64 ] http://mirrors.aliyun.com/mongodb/apt/ubuntu trusty/mongodb-org/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list

yum list

yum -y install mongodb-org

vim /etc/mongod.conf

（1）systemctl start mongod.service #启动

systemctl stop mongod.service #关闭

（2） mongod -f /etc/mongod.conf #启动

mongod -f /etc/mongod.conf --shutdown #关闭