Hi Mr.Rohit,
According to your description, you are suffering memory leak issue.
You may check if the following articles could be of help:
Determining Whether a Leak Exists:
https://msdn.microsoft.com/en-us/library/windows/hardware/ff541886(v=vs.85).aspx
How to Find A Memory Leak:
https://msdn.microsoft.com/en-us/library/ms859415.aspx?f=255&MSPPError=-2147217396
Using MemTrack to Isolate Memory Leaks:
https://msdn.microsoft.com/en-us/library/ms859419.aspx
Maybe as an workaround, you may increase the virtual memory to improve the performance.
Besides, since WSUS forum is for windows update and WSUS server deployment issues, so it seems here is not the most suitable forum to provide professional help about this issue.
Best Regards,
Anne
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