Strange behaviour

[glorybound]

I have an interior scene that rendered one view in less than two hours. I panned the camera over a few feet, let it run, and returned an hour later with 27 hours left. I stopped it, hit render again, and now the estimated time is 2 hours. What would cause such strange behavior? Is this normal?

[nicolas_fuminier]

Hello,

It can be a graphic card memory leak.
You should monitor your VRAM usage between thos two frame. You may have pass the first frame short in VRAM usage and did not pass the second frame because of a VRAM memory leak.
By reseting your render you've cleaned the VRAM in your card and let render run ok and not overloaded.

I might be totaly wrong about the issue

Best,
Nicolas