Server Web Application, VizQL Server, or Background Tasks Processes Down After Upgrade

Product(s): Tableau Server
Version(s): 7.0, 8.0
Last Modified Date: 19 Jun 2014

Article Note: This article is no longer actively maintained by Tableau. We continue to make it available because the information is still valuable, but some steps may vary due to product changes.

After upgrading to Tableau Server 7.0 and later, you may notice that the Status table on the Tableau Server Maintenance page shows several processes that appear to be down. This occurs when more than eight instances are configured for the following processes: Server Web Application (wgserver), VizQL Server (vizqlserver), or Background Tasks (backgrounder).
Performance improvements made in Tableau Server 7.0 and later require fewer instances of these processes to achieve the same level of scalability as before. For example, each process instance can now handle up to 25 threads. This provides improved performance and scalability over previous versions of Tableau.
When upgrading to version 7.0 and later, Tableau recommends running two instances of each of the above processes. During the upgrade process, prior configurations are reset to this default. Use this default configuration to assess Tableau Server’s performance before adjusting the values back to your original configuration. In conjunction with these improvements, Tableau now limits the maximum number of instances per process to eight.
If the Maintenance page shows that there are more than eight instances of one process, and those additional instances have a status of down, Tableau recommends using the Tableau Configuration dialog box to set the values back to two each. For more information about upgrading Tableau Server and the above processes, refer to the Upgrade topic in the Server Online Help. Alternate Search Terms:services down, server services, processes, wgserver, vizql, vizqlserver, background, backgrounder
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