MVC Web API json response truncated?

Question

I have an MVC 4 Web API in C# hosted in IIS 7
Basically this service has a queue that has items enqueued every minute. I expose a GET method that allows for all the items in the queue to be returned in a json array.
the queue is really this: Queue<List<CustomObject>> mQueue; then every minute a new list is enqueued.
The max size of the queue is 50 (1 hour of data)
the maximum count of a list in said queue is ~500 and minimum count is ~100. When I debug the api locally It will return all the elemnets in the queue no problem. only takes a couple seconds. The size of the json response (saved to disk) is ~10Mb.
So I decided to host this service on a VM. I let it run for a while so the queue gets populated. then I make my request:
http://somepoint:4328/AzureQueueService?view=Full
I only get 1.30 - 1.32 mb of data back. Which equates to about 4 minutes worth of data! So the question becomes is there some setting in IIS that forces the response sent to be less than 2Mb? Maybe there is a similar setting in my webconfig? Or maybe IIS
has created more than one instance of my service? Either way, I'm missing something here.

Answer 1

What OS (including SP number) your service is running on? (both local and VM)
Do you receive the same amount of data as specified in Content-Length header? Is your response a valid JSON (just having less data than expected), or it is really truncated?
Where is your queue hosted? Is it just a static object inside IIS process, or somewhere out-of-process?
How is it filled? By another method passing incoming data? Do you use thread synchronization when accessing the queue?
IIS may have multiple worker processes per application, and each will have its own static queue (of course, if it is hosted in-process). Also IIS might recycle worker processes, so in-process data could be lost.