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About ArcGIS Server Administrator Directory and concerning the Server Machine Properties, what are the differences between :

  • App server maximum heap size (in MB)
  • SOC maximum heap size (in MB)

Current Version: 10.5.0

Platform: Windows Server 2012 R2-amd64-6.3

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    Those parameters seem to be related to the maximum file size that can be sent to the GIS Server. But I don't understand how it could be tested. – Stelvio Ceccotti Dec 5 '18 at 9:43
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Heap size is a property and SOC is a component of the ArcGIS Server. You can't really compare them.

Both the App Server (Application Server) and the SOC (ArcSOC process) are components of the ArcGIS Server. (Ie. these map to actual *.exe processes you'd see in your task manager)

The Heap size setting (in MB) property is generally only changed when you're uploading larger files or making requests that require a large amount of memory to process. Typically the SOC heap size is set to 64mb and is sufficient. The AppServer heap size is generally set to 256mb by default.

A few examples of when you may need to modify the setting:

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