size of the executable

[ashishkumar]

I am using the following code on linux platform and using the g++ compiler. (test.cc)

int a[10];
main() {
a[0]=1;
}
g++ test.cc

Size of a.out is 4706.
Change the length of the array from 10 to 100 size remains the same.
a[100] => 4706
a[1000] => 4706
a[10000] => 7574
Question: Why the size of a.out changed from 4076 to 7574

a[20000] => 4706
Question: Why the size is back to 4706 from the earlier 7574

Although this might not be strictly related to C++.

[S6k9GNh0]

Erm.. what is the unit size exactly?

[ashishkumar]

I did not understand the question. Are you referring to the page size.
$getconf PAGESIZE returns 4096 on my machine.