Sounds like a great feature. 

How can it be tested? 

I am particularly thinking of window servers and effect of this on a live 
system and any performance issues.  

It is an exciting feature. Thanks guys. 


-----Original Message-----
From: pgsql-general-ow...@postgresql.org 
[mailto:pgsql-general-ow...@postgresql.org] On Behalf Of David Rowley
Sent: 23 January 2016 03:14
To: John R Pierce
Cc: PostgreSQL
Subject: Re: [GENERAL] 9.5 new features

On 23 January 2016 at 09:49, John R Pierce <pie...@hogranch.com> wrote:
> one of my coworkers says he thought that 9.5 has some enhancements in 
> partitioning, but looking at the release notes I don't see anything specific
> ?    do BRIN's play into partitioned tables ?
>
> in our case, we partition very large 'event' tables by week with 6 
> month retention....

BRIN can be seen as a form of "automatic partitioning", and I have seen it 
described as such in documents relating to the BRIN project, so perhaps that 
description has made its way further afield and that's maybe what your coworker 
heard about.

If you view the inheritance partitioning feature as a method of eliminating 
scans of partitions which can be proved unneeded at planning time, then BRIN 
can eliminate blocks from a scan of a single relation (or rather 
"pages_per_range") during execution time. So I agree with the "automatic 
partitioning" description.

-- 
 David Rowley                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


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