Increasing memory usage with TTree:Fill()

ROOT
1

Dear ROOT developer,
I have a trouble on increasing memory usage with TTree::Fill().
Is it an expected behavior? How can I stop it?
I use root 5.12/00e or 5.13//02 with gcc3.2.3 in slc3 (lxplus at cern).
A short program and results of memory usage are attached.
Best regards,
Hajime
rootforum.tar.gz (7.79 KB)

memusage13.gif696×472 8.76 KB


memusage12.gif696×472 8.79 KB

2

I cannot reproduce your problem. See in attachment the log file produced by your program on my machine running SLC3 and gcc3.2.3.

Rene
xwrite.tar.gz (3.13 KB)

3

Dear Rene,

I’m sorry for the rack of information.
Please modify the line 27 of write.C
from
const int num=10;
to
const int num=100;
.
The result from original code corresponds to the red graph (array szie==10)
and that from the modified version corresponds to the blue graph (array size==100).
Please try the modified version.
Your result is similler to my red graph with root 5.13/02, and
the increase of memory usage is reproduced in your result.
Best Regards,
Hajime