Here's a couple helpful items I found here:
When publishing a workbook, refreshing an extract, or viewing a workbook on Tableau Server, the main timeout settings to be aware of include the following:
- gateway.timeout: Covers the duration of any action on Tableau Server, such as publishing a workbook with a large external file or extract.Default value is 1800 seconds."
This may also be applicable:
vizqlserver.querylimit: Covers specifically the queries executed to return views or populate extracts
Default value is 1800 seconds.
Would this apply for exporting files too?
Not 100% positive, but I would guess the gateway.timeout would cover that as well.