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Slow Loading and Incorrect Previews in Presentation Viewer

Hello PA Team,

I'd like to report a performance and rendering issue with slide previews in the Presentation viewer.

The Issue:
When opening a Presentation, the slide previews (thumbnails) often take an excessive amount of time to load (40+ seconds).

Observed Symptoms:

  1. Grey Placeholders: Users see grey boxes instead of slide previews for a long time.

  2. Stale/Incorrect Images: Sometimes, the viewer initially displays thumbnails from a previously opened presentation before eventually updating to the correct ones. This is very confusing for users.

Impact:
This significantly degrades the user experience. Users are left waiting or are misled by incorrect thumbnails, making navigation difficult.

Expected Behavior:
Slide previews should load reasonably quickly. If loading takes time, a proper loading indicator should be shown, and the system should never display cached thumbnails from a different presentation.

Screenshots:

  • Screenshot 1: Grey placeholders (loading state). 

  • Screenshot 2: Correct previews (after ~40 seconds).

    Please investigate the performance of the thumbnail generation/caching mechanism.

Thanks.

2 replies

null
    • "making the sophisticated simple"
    • AviPerez
    • 1 mth ago
    • Reported - view

    Your repository database is slow. This is typically because its sitting on weak server resources; its sitting on shared resources that are overwhelmed; or its not configured for high volume multiple, concurrent requests. Or, all of the above.

      • TKH_TKH
      • 3 days ago
      • Reported - view

       

      Hi Avi,

      Thanks for the pointer.

      We investigated the repository database server based on your feedback. At the exact moment the issue reproduced (30-40 second delay), the repository server monitoring showed plenty of available resources (e.g., 20GB out of 32GB RAM free). There were also no errors in the logs.

      While a slow DB could explain the delay, it doesn't quite explain why the viewer renders stale thumbnails from a completely different, previously opened presentation during that wait time. This behavior feels more like a client-side caching or state cleanup issue rather than just a slow retrieval from the DB.

      Could this be a bug in how the viewer clears the previous state while waiting for the new data?

      Thanks.

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  • Status Answered
  • 3 days agoLast active
  • 2Replies
  • 26Views
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