Clojurians Log v2

I'm using the default immutant configuration of luminus to run an app on Heroku (one dyno) that mostly serves up static files, with occasional post requests logging data to a mongo db. I'm running into performance problems, and suspect that it may be caused by immutant slowing down or blocking when serving a file to a slow-loading client. I'd like to get some input from an immutant expert. See my description here: https://groups.google.com/forum/#!topic/luminusweb/bpJnO2CY4LM Is there a simple fix, such as a tweak to number of io threads, or do I need to switch to an async server like aleph?

Hi, someone work with Immutant 2 and protobuff. When i try to convert stream -> clojure hash map (in safary) i catch

java.io.IOException: UT000034: Stream is closed