When a dashboard is shared with everyone, there is a chance that it will experience high demand and generate a large amount of traffic. High-demand activity can happen when a dashboard gets picked up by social media, a news feed, or other outlets.
The following best practices ensure that the traffic generated by a dashboard leverages ArcGIS Online's scalable infrastructure and scales effectively in high-demand situations.
Dashboard data sources
Data sources are the web maps and web layers stored within your ArcGIS Online organization. Follow these guidelines for optimizing the layers in your dashboards.
- Ensure that your dashboard and all referenced web maps and layers are shared with everyone.
- Ensure that all layers used in the dashboard are a hosted feature layer, feature layer view, or hosted tile layer.
- Ensure that editing, sync, and ownership-based access control are all disabled.
Ownership-based access control might still be enabled (even after sync is disabled). Follow the steps in this article to disable ownership-access control on the layer.
If your data requires editing, avoid sharing it with the public. If sharing is required, create a feature layer view and ensure it follows these best practices.
- Hosted feature layers and feature layer views should have their cache control duration set to a value that reflects how often the data is actually updated (the default is 30 seconds).
- For hosted feature layers with a large number of features, create attribute indexes on any fields that are queried often.
- Layer filters and view definitions should not include relative date conditions. These are the in the last or not in the last operators.
When authoring and sharing a dashboard, the following configuration options ensure that your dashboard makes the best possible use of the platform's scalable infrastructure and that changes to a dashboard's sharing do not negatively impact your organization.
- If your dashboard has one or more map elements, do not set up any filter actions in response to the map extent changing.
- When configuring a filter action, and the target is based on a
different data source, do not use the Spatial method. Instead, use
the Field method.
Note: You may need to pre-process your data to add additional fields before configuring your dashboard.
- If your dashboard uses embedded content to include other apps that use ArcGIS Online content, ensure that they follow best practices for scalable apps.
- When sharing a dashboard URL or using a URL to embed your dashboard into another page, use the generic URL starting with www.arcgis.com instead of your organization-specific URL.
- When configuring dashboard elements and selectors, avoid using
relative date filters with the following operators:
- is within the last
- is before the last
- is within the next
- is after the next
- When using is before or is after operators, do not use the default period Now.