> Depends what people want to do. We could make the default "0kB", and
> define that to mean "auto-tune", or we could remove the parameter
> altogether. I think I was envisioning the latter, but if people are
> hesitant to do that we could do the former instead.
Unfortunately, we might still need a manual parameter for override
because of the interaction between wal_buffers and
synchronous_commit=off, since it sets the max size of the unflushed data
buffer. Discuss?
And the "auto" setting should be -1, not 0kB. We use -1 for "use
default" for several other GUCs.
Other than that, I think Greg's numbers are fine, and strongly support
having one less thing to tune.
-- -- Josh Berkus PostgreSQL Experts Inc.
http://www.pgexperts.com