ArcGIS Server 10.7.1: How the number of requests is calculated?

Question

I couldn’t figure out how the number of requests is calculated. For example, how the following actions are translated in terms of request:

A user who is panning the map

A user who is downloading a service

A user who is editing a service

ArchitSrivastava · Answer

Hello Jamal NUMAN‌,

I used Chrome Developer tools to display the request. Apologies for late response.

JamalNUMAN · Answer

Thanks Archit.

Which App do you use to display the requests?

ArchitSrivastava · Answer

Hello Jamal NUMAN‌,

Thanks for the response. As per my understanding,  I believe it will only calculate the request which are being sent. For e.g. Let's assume I launched a Map Service in "ArcGIS JavaScript Viewer" from Rest API and it sent 4 requests to load/render the data.

Then if I zoom in further and it sent out 5 more requests to load the new data. Now, if I zoom out to previous extent, the browser already has the data Cached, so it will not be sending the requests to the Server and the total number of request should be 9. Obviously, the consideration would be that I am not changing the extent in the whole hypothetical process.

I tried to capture this with a service from Sample Server 6 (GIF attached), you will notice that first rendering sends a request and then when I zoom in again, it sends a requests to fetch the data but if I zoom-out, it doesn't send a new request as the browser already has that information.

This is actually managed by "Etags", to elaborate more about this property below documentation should help:

Improve map service display performance—ArcGIS Server | Documentation for ArcGIS Enterprise

Hope it helps!

Thanks & Regards,

Archit