Reproduction steps:
1. Open the project provided
2. Enable Graphics job (Experimental) in player settings
4. Open Task Manager
3. Build and play it
4. Wait for build to fully initialise
-Observe the memory increasing at 4-16 kb/s in Task Manager's Details tab

Note: With Graphics job disabled memory usage stops growing after Unity is fully initialised (it takes a few seconds)

Reproduced on: 5.6.0a1, 5.4.2p1 ,5.4.1p4
Graphics job is not available in 5.3 and 5.2