service soemtime will get slower -- what to watch

Hi,

I use C# wrote an Client/Server application. In production environment, will be 130 clients (Windows XP) connect to a Server (Windows 2000/2003 Server) thought TCP/IP socket in a local 100M LAN. "Server" is running as a Windows service. The is one thread running for one clinet in the server.

Sometime the user tells me the Sever will be slow after it runs for 1-2 days.

Usually what will be the cause? Managed code won't have memory leaking, right? And how efficient is the garbage collection in .NET? Should I force garbage collection once a while in my code?

And if I want to use the performance counter to check the problem, what usually are the objects/parameters I should look at? How many threads are running for my service? Memory used by the service or each server thread in my service? Thread idle time ..? I just see too many things in the performance counter.

And if I write code to sample those performance parameters, will it make the service runs even slower?

Thanks!

Ryan

.

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