I'm wondering about Heroku's use of Varnish. Suppose I have a page that is expensive to produce (lots of database queries) but can be cached in Varnish. Right after Varnish's copy expires, if it's very popular, I might have a dozen people accessing it simultaneously before the newly created version can be stashed in Varnish.
So, based on a thread I found (http://www.gossamer-threads.com/lists/ varnish/misc/14750) it looks like Varnish is smart enough by default to only send that expensive request to my backend once, and serve up the response to all the people waiting for it (to prevent a dogpiling effect). But I know that Heroku has its own configuration for Varnish (with lots of servers in a hash ring), and I was wondering whether it's still set up to do this. Thanks! -- You received this message because you are subscribed to the Google Groups "Heroku" group. To post to this group, send email to her...@googlegroups.com. To unsubscribe from this group, send email to heroku+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/heroku?hl=en.
