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Re: Unlogged vs. In-Memory

From: Magnus Hagander <magnus(at)hagander(dot)net>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, PostgreSQL Advocacy <pgsql-advocacy(at)postgresql(dot)org>
Subject: Re: Unlogged vs. In-Memory
Date: 2011-05-03 18:45:56
Message-ID: BANLkTinX+gfMpC3PGvetVXqb0=ByjhYqBA@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-advocacypgsql-hackers
On Tue, May 3, 2011 at 20:07, Josh Berkus <josh(at)agliodbs(dot)com> wrote:
> On 5/3/11 11:01 AM, Kevin Grittner wrote:
>> In other words, calling it an in-memory table does capture
>> the essence of the intent; it is enough if the caveats which come
>> later cover the exceptions, IMO.  But let's not rename the feature;
>> this is about marketing presentation.
>
> Right.   What I'm suggesting ... and have already been doing, because I
> didn't realize it would be a problem, is that we say something like this
> in the description:
>
> "Unlogged tables are similar to in-memory tables or global temporary
> tables."

They are *not* similar to in-memory table, in that they are *always*
written to disk. AFAIK that is - or do they actually get spooled in
RAM-only until they get big enough? I'm prettysure they don't.

They *are*, however, pretty similar to global temporary tables. Are
those well known enough to be used for the pitch without mentioning
in-memory tables?


> Part of the problem is the name we're using for the feature.  "Unlogged
> tables" sounds like we've taken something away and are calling that a
> feature.  "Now with no brakes!"  As feature names go, it's as unsexy as
> you can get.

"nosql tables"? ;)

-- 
 Magnus Hagander
 Me: http://www.hagander.net/
 Work: http://www.redpill-linpro.com/

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