Re: Choosing parallel_degree

On 22/03/2016 07:58, Julien Rouhaud wrote:
> On 21/03/2016 20:38, Julien Rouhaud wrote:
>> On 21/03/2016 05:18, James Sewell wrote:
>>> OK cool, thanks.
>>>
>>> Can we remove the minimum size limit when the per table degree setting
>>> is applied?
>>>
>>> This would help for tables with 2  - 1000 pages combined with a high CPU
>>> cost aggregate.
>>>
>>
>> Attached v4 implements that. It also makes sure that the chosen
>> parallel_degree won't be more than the relation's estimated number of pages.
>>
> 
> And I just realize that it'd prevent from forcing parallelism on
> partitionned table, v5 attached removes the check on the estimated
> number of pages.
> 
> 

The feature freeze is now very close.  If this GUC is still wanted,
should I add this patch to the next commitfest?


-- 
Julien Rouhaud
http://dalibo.com - http://dalibo.org