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Re: Core Extensions relocation

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Greg Smith <greg(at)2ndQuadrant(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Core Extensions relocation
Date: 2011-11-21 20:02:10
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Lists: pgsql-hackers
Greg Smith wrote:
> On 11/21/2011 11:40 AM, Bruce Momjian wrote:
> > I think a question is how often people are waiting for features that
> > actually can be addressed in a contrib/plugin way.  My gut feeling is
> > that most missing features have to be added to the server core (e.g.
> > index-only scans) and are not possible to add in a contrib/plugin way.
> >    
> Good question; let's talk about 9.0.  We were building/distributing 
> three things for that version that poked into the server:
> -Replication monitoring tools that slipped from the 9.0 schedule, 
> similar to what became pg_stat_replication in 9.1
> -An early version of what became hot_standby_feedback in 9.1.
> -pg_streamrecv
> While these weren't all packaged as extensions per se, all of them used 
> the PGXS interface.  And they all provided deployment blocking features 
> to early adopters before those features were available in core, in some 
> cases after the issues they address had been encountered in production 
> deployments.  As I was ranting on my blog recently, I'm seeing more 
> complaints recently about monitoring and management features--exactly 
> the sort of thing that you can improve as an extension, and that the 
> extensions I've proposed provide--than I am over missing big features.
> Index-only scans are a good example, as one of the most requested 
> performance feature you can only get in core (I'd put them at #2 behind 
> materialized views for the customers I talk to).  I wouldn't bet that 
> they are considered more important by a typical deployment than good 
> built-in query profiling though.  I get complaints about query 
> monitoring from every single PostgreSQL install, while complaints about 
> not having index-only scans only come from the bigger installations.  
> Note how demand is high enough that we have two pg_stat_statements 
> replacements submitted right now.

Agreed much of the edge stuff, e.g. monitoring, can be done as plugins.

  Bruce Momjian  <bruce(at)momjian(dot)us>

  + It's impossible for everything to be true. +

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