The PostgreSQL ODBC driver used by Tableau Server was upgraded to version 09.03.0300.
Adding a worker node to the Tableau Server cluster will no longer consume a core license when the worker is not configured for any server processes or any core licensed processes.
The version of PostgreSQL used by Tableau Server was upgraded to 9.3.4. This upgrade resolves a PostgreSQL issue that, for some customers, resulted in increased database size and decreased performance. This problem resulted in many repetitions of "WARNING: pgstat wait timeout" in the PostgreSQL log files. Customers that worked around this issue using” tabadmin set pgsql.use_vacuum_job=true” need to reset this value to the default using "tabadmin set pgsql.use_vacuum_job=false". Tableau recommends you do the reset before upgrading, but you can do so immediately after installing the new version if you need to.