"Merlin Moncure" <[EMAIL PROTECTED]> writes:
> If you use tablespaces to put a high-update, non-critical table on a
> ramdisk, will updates to that table will still cause the WAL files to
> sync?

Sure.  Postgres has no way of knowing that there's anything special
about such a tablespace.

> I'm looking for a way to turn off syncing completely for a table.

There isn't one, and I'm not eager to invent one.

                        regards, tom lane

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