Except we didn't have that. This was 99.9% content pages dynamically generated and nearly static. They all had roughly the same headers that haven't changed rea

Except we didn't have that. This was 99.9% content pages dynamically generated and nearly static. They all had roughly the same headers that haven't changed really, and they were not even aware of Varnish. Response headers is the first thing we checked, there are only a few of them that affect Varnish: https://www.varnish-software.com/static/book/HTTP.html https://www.varnish-software.com/static/book/HTTP.html