Hi Saji,
Is this behavior recently noticed? Did the pages load instantly before? If so, any recent changes, e.g upgrades or patches, Role based security changes etc, or any Managing/Monitoring node changes?
Typically, prognosis can take some time to load data after it is initially requested. I'd imagine, thick client would be slower than webUI. Also some displays are meant to send the request only if someone opens the display, for such displays, delay might be understandable.
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Thanks,
Shoaib