Re: patch for geqo tweaks - Mailing list pgsql-hackers

From Thom Brown
Subject Re: patch for geqo tweaks
Date
Msg-id CAA-aLv7x4a6_4LLeoPAOtV-mDpg7+Ys2bHQ-T4S3dJC7JwwwqA@mail.gmail.com
Whole thread Raw
In response to patch for geqo tweaks  (Nathan Wagner <nw+pg@hydaspes.if.org>)
List pgsql-hackers
On 8 September 2015 at 14:44, Nathan Wagner <nw+pg@hydaspes.if.org> wrote:
I have two patches to make the geqo initialization and mutation
slightly better.

The first adjusts the mutation swaps to avoid having to re-pick
ties.  The second changes the initialization and shuffling algorithm
for the gene array to use an in-place Fisher-Yates shuffling
algorithm.

Could you provide a demonstration of these being beneficial with a test cases?

--
Thom

pgsql-hackers by date:

Previous
From: Tom Lane
Date:
Subject: Re: Memory Context Info dump
Next
From: Alvaro Herrera
Date:
Subject: Re: Allow a per-tablespace effective_io_concurrency setting