Ubuntu – Free cached memory

We can find the memory usage on a Ubuntu server using the following command

free -m

linux-free-cached-memory-1
 

You can find that some memory is cached. If you want to release the cached memory, use the following command.

echo 3 > /proc/sys/vm/drop_caches

 

Check the memory usage again.
linux-free-cached-memory-2
 

Done =)

Reference: Why is the cache in my memory always full?

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