On Tue, Mar 4, 2014 at 2:28 PM, Nate McCall <nate@thelastpickle.com> wrote:
The commit log replay is single threaded, so if you have a ton of overwrites in a whole lot of commit log (like you would with a queue pattern) it might be backing up. 

The only real work around to this right now would be to turn off durable writes to the queue schema. 

Or you can call "nodetool drain" every time before you shut down? This will mark the entire commit log clean and there will be nothing to replay on startup...