编译并安装lookbusy
apt -y update
apt -y install curl build-essential
curl -L http://www.devin.com/lookbusy/download/lookbusy-1.4.tar.gz -o lookbusy-1.4.tar.gz
tar -xzvf lookbusy-1.4.tar.gz
cd lookbusy-1.4/
./configure
make
make install新建systemd服务：
systemctl edit --full --force lookbusy.service写入如下配置：
[Unit]
Description=lookbusy service
[Service]
Type=simple
ExecStart=/usr/local/bin/lookbusy -c 11 -m 2000MB
Restart=always
RestartSec=10
KillSignal=SIGINT
[Install]
WantedBy=multi-user.target
参数-c指cpu使用率，-m指内存使用量。可以根据自己的实例配置来适当配置。
启动并保存
systemctl enable --now lookbusy.service如何停止
systemctl disable --now lookbusy.service检查机器cpu、内存、负载情况
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