Re: jsonb format is pessimal for toast compression

On 09/25/2014 10:14 AM, Bruce Momjian wrote:
> On Thu, Sep 25, 2014 at 06:01:08PM +0200, Andres Freund wrote:
>> But independent of which version is chosen, we *REALLY* need to make the
>> decision soon. This issue has held up the next beta (like jsonb has
>> blocked previous beta) for *weeks*.
>>
>> Personally it doesn't make me very happy that Heikki and Tom had to be
>> the people stepping up to fix this.
>
> I think there are a few reasons this has been delayed, aside from the
> scheduling ones:
>
> 1. compression issues were a surprise, and we are wondering if
> there are any other surprises
> 2. pg_upgrade makes future data format changes problematic
> 3. 9.3 multi-xact bugs spooked us into being more careful
>
> I am not sure what we can do to increase our speed based on these items.

Alternately, this is delayed because:

1. We have one tested patch to fix the issue.

2. However, people are convinced that there's a better patch possible.

3. But nobody is working on this better patch except "in their spare time".

Given this, I once again vote for releasing based on Tom's lengths-only
patch, which is done, tested, and ready to go.

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com