Re: Auto-tuning work_mem and maintenance_work_mem

On 10/17/2013 08:55 AM, Kevin Grittner wrote:
>
> Robert Haas <robertmhaas@gmail.com> wrote:
>
>> I still think my previous proposal of increasing the defaults for
>> work_mem and maintenance_work_mem by 4X would serve many more
>> people well than it would serve poorly.  I haven't heard anyone
>> disagree with that notion.  Does anyone disagree?  Should we do
>> it?
>
> I think that it makes sense to do that.  Those are still reasonable
> defaults for a machine with 2GB of RAM, maybe even with less.
> We're talking about putting this only in a release that will come
> out in 2014.  How many machines used for a database server that new
> will have less than that?

A lot. A whole lot, more than what most people have in production with 
more than that. You are forgetting a very large segment of the 
population who run... VMs.

Why don't we just have 3 default config files:

2GB memory
4GB memory
8GB memory

Have initdb detect how much memory is available on the machine in TOTAL 
and pick the most appropriate.

Joshua D. Drake


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