Thread:Project:Support desk/how do you rebuild the thumbs

I decided to rebuild the image/thumb directory the other day after noticing a bug with imagemagick was resolved. Turns out that removing the image/thumb directory isn't the best thing to do as several convert processes spawn and consume all available memory and well, the story doesn't get better from there. Is there a controlled way to rebuild the images or perhaps a way to throttle the number of convert commands?