Excessive slowness in Windows Server response

Dear Experts.

We are currently encountering a very weird situation we need your support to identify the reason.

We have a live 3-Tier Mobile Banking system where a Mobile Apps client accesses the Bank back-end system through our Middleware system which is written in C#.

The problem is, when our Middleware system is in the "production environment" (secured zone, etc) some responses/queries takes very long time (around 30 seconds), while the same middleware in the test environment connected to the live DB takes 1-3 seconds !! Both queries return the same correct data at the end but test env returns it in 2 seconds while the production takes 10 times more !!
Any ideas ?? Note that we have limited access to the customer deployment structure, DB, etc.
myh123Asked:
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Is that behaviour repeatable? I.e. same queries always are slow, while others are not?
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myh123Author Commented:
Yes it is. Some services only are contiuously slow, but we noticed it's slow only when the response is Empty or Null
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myh123Author Commented:
So when the response is not NULL both env returns the response quickly. But when it's NULL the live is toooo slow !!

Note that Live env has load balancer with distributed loading on 8 servers
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Maybe the load balancing leads to asking all 8 servers if there is no result?
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myh123Author Commented:
Would it take 20-30 seconds ?!
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
It would last 8 times the time for a single query, so that is in the observed time range.
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Seth SimmonsSr. Systems AdministratorCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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Windows Server 2003

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