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Add a note about huge pages to our Postgres doc (#11467)

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* Add note to postgres doc about hugepages

* Newsfragment
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Shay 2021-11-30 19:05:20 -08:00 committed by GitHub
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Add a note about postgres memory management and hugepages to postgres doc.

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@ -118,6 +118,9 @@ performance:
Note that the appropriate values for those fields depend on the amount
of free memory the database host has available.
Additionally, admins of large deployments might want to consider using huge pages
to help manage memory, especially when using large values of `shared_buffers`. You
can read more about that [here](https://www.postgresql.org/docs/10/kernel-resources.html#LINUX-HUGE-PAGES).
## Porting from SQLite