Clear the cache from memory

How to clear the cache from memory in Linux:--

Yeah, you are so confused about the cached memory. Your memory is reduced to low and you are worried about that. The only thing in your mind now is to reboot your server. Don't worry about this. Just use this command.

sync; echo 3 > /proc/sys/vm/drop_caches

Hope it helps you.

Example:--

[root@www html]# free -m
total    used    free shared    buffers cached
Mem:   2023    1243     779   0     271     619
-/+ buffers/cache:     352    1670
Swap: 4023   0    4023
[root@www html]# sync; echo 3 > /proc/sys/vm/drop_caches
[root@www html]# free -m
total    used    free shared    buffers cached
Mem:   2023     300    1723   0   1 59
-/+ buffers/cache:     239    1783
Swap: 4023   0    4023