Deleting the buffers and cache reduces the performance of the Linux system! If you’re here because you thought that freeing buffers and cache was a positive thing, go and read Linux ate my RAM!. The short story: free memory is unused memory is wasted memory.
How to Empty the Buffers Cache on a Linux System?
If you ever want to delete the buffer’s cache, you can use the following chain of commands like free, sync, and echo.
[root@linuxshelltips:~]# free && sync && echo 3 > /proc/sys/vm/drop_caches && free total used free shared buff/cache available Mem: 1008876 468376 98244 19468 442256 359588 Swap: 5242876 524 5242352 total used free shared buff/cache available Mem: 1008876 427588 450300 19468 130988 424732 Swap: 5242876 524 5242352
The above is meant to be run as root. If you’re trying to do them using sudo then you’ll need to change the syntax slightly to something like these:
[user@linuxshelltips:~]$ echo "echo 1 > /proc/sys/vm/drop_caches" | sudo sh
If you have any other Linux tips, questions, or doubts? do ask for help in the comments section.