Huge size of ntuple in memory

Hi,

I have the following problem. I use Microsoft Visual C++ 6 under XP and I
have a compiled ROOT code in which I fill entries into an TNtuple several times (let’s say 100). Each filling loop fills about 8 million entries into the ntuple (1 entry consists of 5 floats).
The ntuple gets bigger and bigger in the memory (several hundred megabytes) but when I save it in the end into a Root file, the size of the file is only ~10 MBytes. I checked that it is the filled TNtuple object that eats up that much memory.

How can I improve the code so it doesn’t eat up all my memory?

Thanx,
Balint

see my other posting. You should not create the TNtuple before creating the file. Please, Please read the documentation.

REne

Okay, I promise again, I’ll read it.

Thanx,
Balint