Re: bgwriter, regression tests, and default shared_buffers settings

On 07/19/2012 10:12 AM, Tom Lane wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> On Wed, Jul 18, 2012 at 5:30 PM, Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:
>>> Or we could provide an initdb flag which would set an upper bound on
>>> shared_buffers, and have make check (at least) use it.
>> How about a flag that sets the exact value for shared_buffers, rather
>> than a maximum? I think a lot of users would like initdb
>> --shared-buffers=8GB or whatever.
> That would be significantly harder to deploy in the buildfarm context.
> We don't know that all the animals are capable of coping with 16MB
> (or whatever target we settle on for make check) today.
>
>

Yeah - unless we allow some fallback things could get ugly. I do like
the idea of allowing a settable ceiling on shared_buffers instead of
having it completely hardcoded as now.

cheers

andrew