[WIP] Address feedback on buffer pool size for multinode environment

[Copilot]

Thanks for the feedback on #1729. I've created this new PR, which merges into #1729, to address your comment. I will work on the changes and keep this PR's description up to date as I make progress.

Original PR: #1729
Triggering review: #1729 (comment)

@copilot Any review for Buffer Pool Size of total RAM query for a multinode environment?

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[it-percona-cla]

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