Read Back Mapped File Wasting too Much Memory

Dear Matlab users, I have a problem when read back mapped file. I use memmapfile to directly map a portion of TIFF file into my m-file. And it works for 1200 files and store it as character. This is the example :

nfile = 12000
rawdata = {1.nfile}
for i = 1 : nfile
rawdata{i} = memmapfile ('i-th.tiff') ; % just for example
end

However when i call back and try to use the data inside rawdata, the process taking too much used memory during read out mapped file:

for i = 1 : nfile
read_out = rawdata{i}.data ;
imwrite(read_out) ;
end

I have search for related problem and find nothing. Is anyone in this forum have same problem and have the solution? Thank you for your help.

Best Regards

Mirul

[Jan]

How much is "too much"? How do you determine the amount of used memory? What do you expect when you map 1200 files to memory? How large are the TIFFs?