Memory Management (or Garbage Collection) in the Oscript VM

Hi,

I'm curious about memory management in Content Server, mainly, if you create a Frame, then it goes out of scope, how long does it take before the memory is recovered? It does seem to be eventually recovered but anecdotally it seems to take on the order of hours for this to happen. This is in the case where a large number of frames would be created. And I am using Frames specifically because they are supposed to be disposed once they go out of scope unlike Objects which persist.

-Hugh

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Robert_Haskett

Hello Hugh,

Yes, as soon as a Frame goes out of scope, it is destroyed. However, if you are simply putting objects in there, they won't get destroyed ever. If you are using the FrameWrapper from the Kernel ospace, then yes, it contains a 'destructor' slot that gets called when the frame's refcount goes to zero and it gets destroyed. The destructor will call os.delete on your temp object and clean it up. However, if you are storing these frames in another container, like a subsystem or something that persists, then they will never go out of scope or at least not until the container they are in goes out of scope. There is no garbage collection in oscript, everything ( except objects ) are refcounted and when the refcount hits zero, the variables are deleted from memory.

.r.