Hi everyone,
I'm working with a branch versioning setup on ArcGIS Enterprise and ran into a significant performance issue when switching between versions in a web application built with the ArcGIS Maps SDK for JavaScript 5.0.
Setup:
- ArcGIS Enterprise (federated server)
- Branch versioning enabled on a feature dataset
- Multiple named versions (e.g. `editor1.review_branch`, `editor2.field_update`, `qa.validation_pass`)
- Web app using `VersionManagementService` to switch versions
What I observed:
When querying the FeatureServer — whether using the default version or a named version — response times are fairly consistent and acceptable. The behavior is similar across versions.
However, when switching to MapServer (using `MapImageLayer` with the `gdbVersion` parameter), I'm seeing a dramatic difference:
- Default version (no `gdbVersion`): ~1.5s response time — fast, presumably served from server-side cache
- Named version (`gdbVersion=editor1.review_branch`): 4–6s response time on every request
The moment I add `gdbVersion` to the `MapServer/export` request, the server appears to renders dynamically every time.
Has anyone run into this before, or does anyone have ideas on how to improve response times for versioned MapServer export requests? Any suggestions — whether on the ArcGIS Server configuration side, geodatabase tuning, or a completely different approach — would be very much appreciated. Thanks!
