DotNet FrameWork – What is PID – What is GAC – Day 24 of 30

What is a PID? How is it useful when troubleshooting a system?

PID is the process Id of the application in Windows. Whenever a process starts running in the Windows environment, it is associated with an individual process Id or PID. The PID (Process ID) a unique number for each item on the Process Tab, Image Name list.

How do you get the PID to appear?

In Task Manger, select the View menu, then select columns and check PID (Process Identifier).

In Linux, PID is used to debug a process explicitly. However we cannot do this in a windows environment.

Microsoft has launched a SDK called as Microsoft Operations Management (MOM). This uses the PID to find out which dll’s have been loaded by a process in the memory. This is essentially helpful in situations where the Process which has a memory leak is to be traced to a erring dll. Personally I have never used a PID, our Windows debugger does the things required to find out.

What is the GAC? What problem does it solve?

Each computer where the common language runtime is installed has a machine-wide code cache called the global assembly cache. The global assembly cache stores assemblies that are to be shared by several applications on the computer. This area is typically the folder under windows or winnt in the machine.

All the assemblies that need to be shared across applications need to be done through the Global assembly Cache only. However it is not necessary to install assemblies into the global assembly cache to make them accessible to COM interop or unmanaged code.

There are several ways to deploy an assembly into the global assembly cache:

· Use an installer designed to work with the global assembly cache. This is the preferred option for installing assemblies into the global assembly cache.

· Use a developer tool called the Global Assembly Cache tool (Gacutil.exe), provided by the .NET Framework SDK.

· Use Windows Explorer to drag assemblies into the cache.

GAC solves the problem of DLL Hell and DLL versioning. Unlike earlier situations, GAC can hold two assemblies of the same name but different version. This ensures that the applications which access a particular assembly continue to access the same assembly even if another version of that assembly is installed on that machine.

Please read all the post in the Dotnet Framework series.

Reference : Dilip Kumar Jena ( https://mstechexplore.wordpress.com )

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3 thoughts on “DotNet FrameWork – What is PID – What is GAC – Day 24 of 30

  1. Pingback: DotNet FrameWork – Dot Net Basics Complete Series Reference – Day 0 of 30 « Exploring Dot Net with Dilip Kumar Jena

  2. Pingback: DotNet FrameWork – Dot Net Basics Complete Series Reference – Day 0 of 30 « Exploring Dot Net with Dilip Kumar Jena

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