【mem】 Linux 内存管理及手动释放linux cache内存

Linux内存分析与清理

https://www.jianshu.com/p/774551e6b3ba

 

Linux手动释放内存

https://qiubo.ink/2018/09/25/linux-e6-89-8b-e5-8a-a8-e9-87-8a-e6-94-be-e5-86-85-e5-ad-98

 

手动释放linux内存cache和脚本定时释放

https://www.linuxde.net/2011/07/402.html

 

Linux 内存管理及手动释放linux cache内存

https://blog.****.net/iamplane/article/details/79542452

 

# cat  freemem.sh

#######################################################

#!/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 | [Use：${used}MB][Free：${free}MB]" >> /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.log

else

  echo "Not required" >> /var/log/mem.log

fi

#######################################################