[PR] minor: Add additional info about memory reservation to the doc of MemoryPool [datafusion]

["Kontinuation (via GitHub)" <gi...@apache.org>]

Kontinuation opened a new pull request, #14789:
URL: https://github.com/apache/datafusion/pull/14789

   ## Which issue does this PR close?
   
   This is not related to an issue. It is requested by this comment: https://github.com/apache/datafusion/pull/14644#issuecomment-2665613858
   
   ## Rationale for this change
   
   There's a convention that ExecutionPlans do not reserve memory for the batches it produces, but it is not explicitly stated in the doc. We should explicitly point out those conventions in the doc to make it clear.
   
   ## What changes are included in this PR?
   
   This change clarifies the general conventions that ExecutionPlans need to follow when using MemoryPool: memory for output batches are reserved by their consumers rather than their producers.
   
   ## Are these changes tested?
   
   N/A for doc changes.
   
   ## Are there any user-facing changes?
   
   No


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Re: [PR] docs: Add additional info about memory reservation to the doc of MemoryPool [datafusion]

["xudong963 (via GitHub)" <gi...@apache.org>]

xudong963 merged PR #14789:
URL: https://github.com/apache/datafusion/pull/14789


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