This was my sentiment as well. Further I'm not quite sure how this works -- you run one of these instances on every single memcache instance machine, using pack

This was my sentiment as well. Further I'm not quite sure how this works -- you run one of these instances on every single memcache instance machine, using packet capture? No mechanism to work across a cluster? It seems like something one would make a patch for memcache itself (where injecting such metrics seems quite simple).