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-   -   drop_caches doesn't drop all caches (https://www.linuxquestions.org/questions/linux-software-2/drop_caches-doesnt-drop-all-caches-844042/)

10110111 11-13-2010 08:37 AM
drop_caches doesn't drop all caches
 
I try this command:
$ sudo su -c 'sync && echo 3 > /proc/sys/vm/drop_caches; free'
And here's result:
Code:
            total      used      free    shared    buffers    cached
Mem:      1017108    405280    611828          0          8    183324
-/+ buffers/cache:    221948    795160
Swap:            0          0          0
Why after drop_caches do i still have lots of data cached?

quanta 11-14-2010 11:09 AM
As my understand, it is normal. I suggest you open up 2 Terminals, the first one run "watch -n 1 'free -m'" and the second run the "sync && echo 3 > /proc/sys/vm/drop_caches" to see the memory cache from the first down immediately.


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