Reconstruction system with Intel Realsense D435

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

I need to make the reconstruction with a custom dataset from intel realsense D435. I have already used the [realsense_recorder.py](https://github.com/isl-org/Open3D/blob/master/examples/python/reconstruction_system/sensors/realsense_recorder.py) to get the data.
1- When I use the reconstruction system, make_fragements I got this error when I use the **joblib** as **MAX_THREAD**
but when I put the n_jobs to 2 it works fine but took too much time

2- When I use the reconstruction system I got this "**Killed**" in the integration step and I have read that this means out of memory but I have already alot of memory in my laptop.

3- Also, when I run the reconstruction system it took almost all the RAM ans swap memory. Is this behaviour ok with open3d or is there something wrong I should do?

> - Operating system: Ubuntu 18.04
> - Python version: Python 3.8.10
> - Open3D version: 0.13.0