RAM problem on Ubuntu.

[sayeedhossain]

I have in total 4 gb + 4gb = 8 gb RAM in my machine. The problem is that, when i wanna to check the free RAM then I think there are some problem . Because you can see in the following image , total is 7.2 Gi and used is 4.2 Gi but free is only 131 Mi . But you know the free RAM should be (7.2-4.2)=3 Gi. Please tell me anyone what actually the problem .

 

[captain-sensible]

what is the output of :

sudo free -tm

eg on my system :

bash-5.0# free -tm
                     total        used        free      shared  buff/cache   available
Mem:           3881        1343        1079          47        1459        2072
Swap:          2981           0        2981
Total:           6863        1343        4061
bash-5.0#

total = 6863

used 1343
+ free 4061

+ put aside for cache 1459
----------------------
6863

----------------------------

 

[Deleted member 101831]

https://ubuntuforums.org/showthread.php?t=2457300

 

[sayeedhossain]

what is the output of :

sudo free -tm

eg on my system :

bash-5.0# free -tm
                     total        used        free      shared  buff/cache   available
Mem:           3881        1343        1079          47        1459        2072
Swap:          2981           0        2981
Total:           6863        1343        4061
bash-5.0#

total = 6863

used 1343
+ free 4061

+ put aside for cache 1459
----------------------
6863

----------------------------

Thanks. Now I properly understand. Actually I didn't calculate buff/cache memory . That's why the problem was raised.Thanks a lot.