[syslog-ng] threading question

Hi, Could someone help clarify something for me? I am running with threading enabled, and I have separate redis destinations (three currently) all pointing to the same server. My thought was that each destination would use a separate connection and thread. I then filter log sources and send (roughly) 1/3 to each destination. My question is this. Does each destination get a separate thread? (reading the documentation it left room for doubt). Also - more generally is this a reasonable way to get better throughput to a redis data store? (note: both syslog-ng and redis are running locally, so the connections use 'localhost') Thanks! Jim