The metric has looked wild on CrOS and Mac for since Sep 2017. Previous investigation hasn't turned up anything notable, see issue 768604 for example.
It's not apparent why we only see this on CrOS, and now Mac, which began to show similar memory usage trailing CrOS a bit.
Filing this issue to review how we track picture memory usage, since I recall there were some TODOs and it's known to be done imperfectly. Perhaps there's something obvious where we're doing things wrong/differently by platform and we can clean it up and improve the metric quality.
Comment 1 by sheriffbot@chromium.org
, Oct 24Status: Untriaged (was: Available)