Hello.

having about 6 Gb free RAM, trying to execute:

string[] dic;
	
for (int i = 0; i < 100_000_000; i++)
{
	
	dic ~= "just a word number "~to!string(i);

	if (i%1_000_000 == 0)
	{
		writef("processed line %s: %s\n", format("%,3d", i), format("%,3d", dic.length));
	}
}

got an error:
"processed line 32,000,000: 32,000,001
core.exception.OutOfMemoryError@src\core\lifetime.d(126): Memory allocation failed"

app used is about 1.6 Gb, more than 4 stays free.

1. What is happened, why dynamic array have mem limit? For example, golang uses all free memory that it can.
2. How to fix this?
3. (optional) How to display memory usage? Cannot find function for this.

Thanks.

My guess is you are compiling to 32bit and the GC tries to reserve >4gb wich it can't, therefore out of memory

Compiling to 64bit with: dmd -m64 -run test.d works no problem

Big thank.

Switch to /bin64 and now works until full memory using.