Tvheadend

I could not find anything like this in the configuration and no pointers to something similar in the forum. First of all, I see no sense in letting packet buffers reside in swappable memory areas and/or forcing other memory to be swapped.

Instead of leaving the job of killing the whole of tvheadend to, e.g., the oom killer on Linux, may I suggest the following features:

1. Configurable packet buffer memory limit: ignore (current behavior), manual setting, heuristic/automatic setting based on system RAM
2. Configurable out-of-memory action: drop frames, stop recording, restart recording
3. Side effect: provide meaningful error message, if recording destination is too slow for real-time recording