Visio Graphics Service service application
Visio Services, much like Access Services and Excel Services, is
implemented as a service application, named Visio Graphics Service. As
the service application architecture has not changed in SharePoint
2013, you install Visio Services as you would in SharePoint Server
2010. Visio Services is still an Enterprise feature; therefore, you
cannot use it if you only have SharePoint Foundation installed or you
have only purchased SharePoint Server Standard Client Access Licenses
(CALs).
To use Visio Services, create a Visio Services service application
on a SharePoint Server farm and purchase an Enterprise CAL for each
user who uses it; then on a site to use the features included in the
Enterprise license, you need to activate the following:
If these features are not enabled, then when a Visio Web Access Web
Part is added to a page or the Visio Web Access page is displayed, an
error message is displayed, as shown in Figure 6.
This is important to remember, as these features can be deactivated and
yet the web part is still on the page and new Visio Web Access Web
Parts can be added to pages.
Visio Services system performance
SharePoint servers running the Visio Graphics Service may be affected by various factors, such as:
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The size of the diagrams being rendered
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The number of diagrams connected to a data source
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The performance of the data sources to which diagrams are connected
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The frequency of data refresh for data-connected diagrams
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Peak loads of users who are accessing diagrams
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Peak loads on external data sources accessed by diagrams
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Complexity of diagrams
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Visio Services cache settings
