There is a stochastic approach that can be adapted to address this problem, I think I first saw it at IMVU in 2009 but conveniently Wikipedia has a good reference now:
<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Cache_stampede#Probabilistic_early_expiration" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Cache_stampede#Probabilistic_e...</a><p>The advantage is less coordination is necessary and you should be able to get down to a single concurrent rerender per page.