View state memory cache
[root@heyong ~]# free -m
total used free shared buff/cache available
Mem: 96406 19256 11311 66 65837 76421
Swap: 4095 1016 3079
Clean the cache of scripts
[root@heyong ~]# vim /home/script
#!/bin/bash
# Started clearing the cache
echo "start clearing the cache"
# Written to disk, to prevent loss of data
sync; sync; sync
# 10-second delay
sleep 10
# Clean the cache
echo 3> / proc / sys / vm / drop_caches
Setting regular tasks (clean up once a day at 2:30 am)
[Root @ gonghuikeji ~] # crontab -e
clear buff/cache
30 2 * /home/script/clear_buff_cache.sh