The database server has been upgraded to macOS 10.12.4 from 10.11.6. In addition macOS Server has been upgraded to 5.3. The combined update has a number of security and performance enhancements (including plugging issues exploited by various intelligence agencies as exposed by Wikileaks.)
MySQL and PostgreSQL database versions are at the latest revisions per this posting.
All other grid servers are at the same versions as above.