Comment 4 for bug 478691

Hi asac,

> also i dont buy the "empty builders should be left unused" from above.

I didn't say how many should be left unsused, just that *some* should be. It's working out how many that should be left unused that's the hard part so that we get a good balance between long and short builds.

>but as long as there is still one builder slot free all should be fine. Maybe you could say if > 20% of builders are idle, just go ahead and schedule.

I don't think it's that simple. We need to look at how long something takes to build and compare that to the number of available builders and how many builds the PPA has queued up.

However, ultimately, we need more builders!