1、手动释放
[root@docker ~]# echo 1 > /proc/sys/vm/drop_caches [root@docker ~]# echo 2 > /proc/sys/vm/drop_caches [root@docker ~]# echo 3 > /proc/sys/vm/drop_caches |
2、脚本自动执行
#! /bin/sh used=`free -m | awk 'NR==2' | awk '{print $3}'` free=`free -m | awk 'NR==2' | awk '{print $4}'` echo "===========================" >> /app/memory/logs/mem.log date >> /app/memory/logs/mem.log echo "Memory usage before | [Use：${used}MB][Free：${free}MB]" >> /app/memory/logs/mem.log if [ $free -le 4000 ] ; 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 used_ok=`free -m | awk 'NR==2' | awk '{print $3}'` free_ok=`free -m | awk 'NR==2' | awk '{print $4}'` echo "Memory usage after | [Use：${used_ok}MB][Free：${free_ok}MB]" >> /app/memory/logs/mem.log echo "OK" >> /app/memory/logs/mem.log else echo "Not required" >> /app/memory/logs/mem.log fi exit 1 |
使用Linux的corn定制任务，每天定时实行上述脚本即可。
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