清理缓存
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches
清理脚本 purgeCache.sh
#!/bin/bash mem_now=`free -m | awk 'NR==2' | awk '{print $4}'`
buff_now=`free -m | awk 'NR==2' | awk '{print $6}'` if [ $mem_now -le 512 -o $buff_now -ge 2000 ]; then
sync
sleep 10
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches
echo "--->release memory OK at $(date +%Y%m%d_%H%M%S)" >> /tmp/purgeCache.log
fi