Repository navigation
Memory not released upon multiple Initialize/Shutdown #2594
Description
Exectuing the following code in a basic Console app leads to the application consuming more and more memory:
Runtime.Runtime.PythonDLL = @"C:\ProgramData\WideTech\Python\python38.dll";
PythonEngine.PythonHome = @"C:\ProgramData\WideTech\Python\";
var count = 1000;
for (int i = 0; i < count; i++)
{
PythonEngine.Initialize();
PythonEngine.Shutdown();
}I am on windows 11 (64bit), using PythonNet v3.0.5, combined with Python 3.8 (happens with Python 3.12 as well).
For more context, we have a WebAPI that runs python 3 code that interacts with C# code. I tried avoiding initalization and shutdown systematically, but then I encounter API crashes. While current implementation might not be perfect (especially given 2008 - that we are facing as well, but is not the topic), it works, besides the increasing memory consumption.
Am I missing anything regarding resources freeing?
Activity
Ledragon commentedon May 28, 2025
Hey,
Any comment on this? Not asking for a solution, but maybe just an insight on knowing if what I am doing is intrinsically wrong?
kunom commentedon Jul 18, 2025
When run from VS Debugger against Python 3.13.3 official release, we seem to leak 25 objects/1.51 kB per iteration, mostly anonymous types within
Python.Runtime.Interop:They seem to be rooted at the following static variables:
Python.Runtime.Interop.allocatedThunksPython.Runtime.SlotsHolderAt least the
allocatedThunksmember is add-only, based on the "find all references" result: