From: | Dave Page <dpage(at)pgadmin(dot)org> |
---|---|
To: | Magnus Hagander <magnus(at)hagander(dot)net> |
Cc: | Josh Berkus <josh(at)agliodbs(dot)com>, 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 18:49:35 |
Message-ID: | BANLkTi=D_SXsTN4z_9WN4B8xK_vq8foHyg@mail.gmail.com |
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On Tue, May 3, 2011 at 7:45 PM, Magnus Hagander <magnus(at)hagander(dot)net> wrote:
> 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?
I wouldn't. Robert and I talked a number of times about him
implementing global temp tables after unlogged tables. If he does,
then things will just get a whole heap more confusing next year if
we're already (mis)used the term.
--
Dave Page
Blog: http://pgsnake.blogspot.com
Twitter: @pgsnake
EnterpriseDB UK: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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