"clear all" command not releasing entire memory

Initially Memory available for all arrays: 3417 MB (3.583e+009 bytes) . After loading a file, Memory available for all arrays: 1635 MB (1.714e+009 bytes) . After "clear all" command,Memory available for all arrays: 2655 MB (2.784e+009 bytes) . It is not releasing entire memory. How to release the entire memory?

Answer 1

[Walter Roberson]

"clear all" is not defined as clearing everything. See

http://www.mathworks.com/help/matlab/ref/clear.html#inputarg_ItemType

Not mentioned there is that some items may be locked in memory:

http://www.mathworks.com/help/matlab/ref/munlock.html

also "clear all" has no effect on current graphics items.

I do not know if it has any effect on system libraries that might get called.

You could experiment with pack()