Gevik Babakhani <[EMAIL PROTECTED]> writes:
> Could someone please explain the MemoryContext switching. For example
> MemoryContextSwitchTo function. How does this work?

src/backend/utils/mmgr/README might help.  It's somewhat pointed at
people who've already been hacking the backend, but I think it will
give you the idea.

The basic point is that palloc() allocates memory in whichever context
was last selected as CurrentMemoryContext by MemoryContextSwitchTo.

                        regards, tom lane

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