Subject: Linux Memory Management
Author: Linux
Posted on: 09/12/2012 07:54:09 PM
You can use free to find out all memory allocated to your Linux box and how many memory your applications can use.
# free -m
total used free shared buffers cached
Mem: 595 382 212 0 132 190
-/+ buffers/cache: 59 535
Swap: 0 0 0
To explain the output, let's consider the general case:
# free -m
total used free shared buffers cached
Mem: A B C 0 D E
-/+ buffers/cache: F G
Swap: 0 0 0
Here comes the facts:
A -- the total memory allocated to your Linux box.
D+E -- buffers/cached memory gracefully occupied by system in case there are availabe.
G(=C+D+E) -- free memory your apps can use.
F(=B-D-E or =A-G) -- used memory by your apps.
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