定时清理脚本
下面是脚本内容#!/bin/bash
used=`free -m | awk 'NR==2' | awk '{print $3}'`
free=`free -m | awk 'NR==2' | awk '{print $4}'`
echo "===========================" >> /var/log/mem.log
date >> /var/log/mem.log
echo "Memory usage | " >> /var/log/mem.log
if [ $free -le 100 ] ; then
sync && echo 1 > /proc/sys/vm/drop_caches
sync && echo 2 > /proc/sys/vm/drop_caches
sync && echo 3 > /proc/sys/vm/drop_caches
echo "OK" >> /var/log/mem.logelse
echo "Not required" >> /var/log/mem.log
fi
保存为freemem.sh
下一步给权限
chmod 755 /opt/freemem.sh
echo "*/30 * * * * root /opt/freemem.sh" >> /etc/crontab
完事
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