Re: Spinlock performance improvement proposal

> This is still missing a bet since it fails to mention the option of
> adjusting -B and -N instead of changing kernel parameters, but that's
> easily fixed. I propose that we reword this message and the semget
> one to mention first the option of changing -B/-N and second the option
> of changing kernel parameters. Then we could consider raising the
> default -B setting to something more realistic.

Yes, we could do that but it makes things harder for newbies and really
isn't the right numbers for production use anyway. I think anyone using
default values should see a message asking them to tune it. Can we
throw a message during initdb? Of course, we don't have a running
backend at that point so you would always throw a message.

From postmaster startup, by default, could we try larger amounts of
buffer memory until it fails then back off and allocate that? Seems
like a nice default to me.

--
Bruce Momjian | http://candle.pha.pa.us
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