操作方法：在公共设施网络的企业部署中，为大型追踪结果确定正确的堆大小设置

摘要

The heap size setting controls the maximum payload that can be traversed by the client, it is set at the service level.  This is important to be aware of when working with ArcGIS Pro in an enterprise deployment of the utility network and executing a trace operation that traverses a large number of features.
Network errors such as the following can be encountered if the payload of a trace operation is larger than what can be accommodated by the default heap size of 64 MB.

“Error 160213 or Error 003642: A networking error occurred.”

原因

The trace result payload exceeds the default heap size set on the service.  The default heap size for each service is 64 MB.

过程

Review the topic Geoprocessing service setting: Advanced properties for information on how to update the heap size setting for a utility network service.

To determine the proper heap size setting for a utility network service needed to estimate the total number of junction and edge elements traversed by a trace, consider the following:

• The default payload size of a trace without results is ~750 bytes
• Each additional junction element introduces ~150 bytes
• Each additional edge element introduces ~175 bytes

The following baselines can be used to estimate the proper heap size setting for a utility network service.

• 64 MB (default) should be sufficient to return ~200,000 edge elements and ~200,000  junction elements.
• 128 MB should be sufficient to return ~400,000 edge elements and ~400,000 junction elements.
• 256 MB should be sufficient to return ~800,000 edge elements and ~800,000 junction elements.

It is important to understand that the existence of midspan connectivity along a line creates multiple edge elements for a single feature.  

• For example, an edge feature with nine midspan junctions consists of ten edge elements, requiring 2500 bytes: 750 + 10 * 175 = 2500.
• Similarly, terminal devices return a junction element for each terminal defined.