On a large private network there seems to be excessive latency between two boxes which I control. This is stopping the server providing a web service to the client as its causing timeouts.
Here's a slow running request logged in Charles
Timing Request Start Time 03/11/10 23:21:33 Request End Time 03/11/10 23:21:33 Response Start Time 03/11/10 23:21:42 Response End Time 03/11/10 23:21:42 Duration 8.99 sec Request Duration 16 ms Response Duration 0 ms Latency 8.97 sec Speed 1.30 KB/s Response Speed ∞ KB/s Size Request Header Size 412 bytes Response Header Size 151 bytes Request Size - Response Size 11.17 KB (11436 bytes) Total Size 11.72 KB (11999 bytes) Request Compression - Response Compression -
As a test I just tried getting an 423k image file via a browser, but this downloads so slow it stalls.
How can I troubleshoot where the problem lies?
I tried using pingplotter
Looks like hops 3 and 4 are the culprits? Where do I go from here?
This turned out to be a problem with the client box running Windows Web Server 2008 R2 and a known network speeds problem if the router is not able to handle network TCP window scaling. Updated router software and problem was resolved.