Re: initdb profiles

Hello All,

Please allow me to put a disclaimer, I am no serious PG hacker,
but would it be possible to allow for a simple config script to be run
(which would work even via /etc/init.d) which could be used to generate a
config file for initdb, which initdb could read and do its thing ?

This script could say do you wish to do a manual adjustment or
accept the default values, and then initdb could feed off that file. Does
this create too much work or is it disadvantageous.

Cheers,

Aly.

On Wed, 7 Sep 2005, Andrew Dunstan wrote:

>
>
> Peter Eisentraut wrote:
>
>> Andrew Dunstan wrote:
>>
>>> I accept the "run from init.d" argument. So then, is there a case for
>>> increasing the limits that initdb works with, to reflect the steep
>>> rise we have seen in typically available memory at the low end?
>>>
>>
>> There is a compromise that I think we cannot make. For production
>> deployment, shared buffers are typically sized at about 10% to 25% of
>> available phyiscal memory. I don't think we want to have a default
>> installation of PostgreSQL that takes 10% or more of memory just like that.
>> It just doesn't look good.
>>
>
> I have a single instance of apache running on this machine. It's not doing
> anything, but even so it's consuming 20% of physical memory. By contrast, my 3
> postmasters are each consuming 0.5% of memory. All with default settings. I
> don't think we are in any danger of looking bad for being greedy. If anything
> we are in far greater danger of looking bad from being far too conservative
> and paying a performance price for that. There's nothing magical about the
> numbers we use.
>
>> So the question whether initdb should by default consider up to 1000 or up
>> to 4000 buffers is still worth discussion, but doesn't solve the tuning
>> issue to a reasonable degree.
>>
>>
>>
>
> True, but that doesn't mean it's not worth doing anyway.
>
> cheers
>
> andrew
>
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--
Aly S.P Dharshi
aly(dot)dharshi(at)telus(dot)net

"A good speech is like a good dress
that's short enough to be interesting
and long enough to cover the subject"