Upgraded to #mastodon version 1.6.0rc4 One thing I have noticed with the older versions is a steady increase in memory. Starts off with 0.5 GB and grows to just over 1GB in time. I'll be curious to see how this one goes.
If you are running on a small memory system (I have 1.7 GB) you probably need to shutdown the mastodon web or streaming service to get enough memory for the assets precompile step.
Not sure if this is a memory leak or just how it works.