The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/11/manage-ag-tablespaces.html Description:
Hi, "default_tablespace" parameter in "postgresql.conf" does something to GATHER (in parallel query). Because when default_tablespace is set to whatever name, and the tablespace doesn't exist, a query using parallel query is now giving the following error : 2019-09-25 16:42:50.444 GMT [71530] ERROR: invalid value for parameter "default_tablespace": "DATA" 2019-09-25 16:42:50.444 GMT [71530] DETAIL: Tablespace "DATA" does not exist. So i suggest to add in documentation that this parameter have an effect on parallel_query. I will fill in a bug report today for this "side effect". regards Virgile