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Re: PostgreSQL as a local in-memory cache

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: jd(at)commandprompt(dot)com
Cc: Josh Berkus <josh(at)agliodbs(dot)com>, postgres performance list <pgsql-performance(at)postgresql(dot)org>
Subject: Re: PostgreSQL as a local in-memory cache
Date: 2010-06-24 20:01:49
Message-ID: AANLkTilGXAKSPDBLLcsH4Jrc6XgnFhuEqSHkcfLryajl@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
2010/6/24 Joshua D. Drake <jd(at)commandprompt(dot)com>:
> On Thu, 2010-06-24 at 21:14 +0200, Pavel Stehule wrote:
>> 2010/6/24 Josh Berkus <josh(at)agliodbs(dot)com>:
>> >
>> >> And I'm also planning to implement unlogged tables, which have the
>> >> same contents for all sessions but are not WAL-logged (and are
>> >> truncated on startup).
>>
>> this is similar MySQL's memory tables. Personally, I don't see any
>> practical sense do same work on PostgreSQL now, when memcached exists.
>
> Because memcache is yet another layer and increases overhead to the
> application developers by adding yet another layer to work with. Non
> logged tables would rock.

I see only one positive point - it can help to people with broken
design application with migration to PostgreSQL.

There are different interesting feature - cached procedure's results
like Oracle 11. - it's more general.

only idea.

For me memory tables are nonsens, but what about memory cached
materialised views (maybe periodically refreshed)?

Regards

Pavel

>
> SELECT * FROM foo;
>
> :D

:)
>
> JD
>
>
>
>
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Subject: Re: PostgreSQL as a local in-memory cache
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