Hello, vmpire, you wrote: V> Hello, KARALIUS, you wrote: KAR>> somebody Can prompt, whether there is at IIS such feature that on each request there was a worker process? Or, while the request does not fulfill, he waits in queue while any worker process will not be released, but nevertheless in one worker process one request in unit of time is fulfilled only? V> it is possible to deliver Requst Limit in unit. But what for? Requst Limit in unit leads to 503rd error at however or serious loading. A question what for - difficult... Integration with old unmanaged the code in which problems above a roof, especially connected to a multithreading, and to solve them is not present time.