From: | Yeb Havinga <yebhavinga(at)gmail(dot)com> |
---|---|
To: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
Cc: | Stefan Keller <sfkeller(at)gmail(dot)com>, pgsql-general List <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Postgres as In-Memory Database? |
Date: | 2014-04-01 19:57:26 |
Message-ID: | 533B1A26.7020309@gmail.com |
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Lists: | pgsql-general |
On 2014-04-01 04:20, Jeff Janes wrote:
> On Sunday, March 30, 2014, Stefan Keller <sfkeller(at)gmail(dot)com
> <mailto:sfkeller(at)gmail(dot)com>> wrote:
>
> Hi Jeff
>
> 2013/11/20 Jeff Janes <jeff(dot)janes(at)gmail(dot)com
> <javascript:_e(%7B%7D,'cvml','jeff(dot)janes(at)gmail(dot)com');>>
>
>
> I don't know what you mean about enhancements in the buffer
> pool. For an in-memory database, there shouldn't be a buffer
> pool in the first place, as it is *all* in memory.
>
>
> You are right: In-memory DBs are making buffer-pooling obsolete -
> except for making data persistent (see below).
>
>
>
> I would be very reluctant to use any database engine which considered
> disk access obsolete.
The disk is not obsolete but something called 'anti-caching' is used:
http://www.vldb.org/pvldb/vol6/p1942-debrabant.pdf
> Are there any show cases out there?
>
>
> What did the HANA users have to say? Seems like they would be in the
> best position to provide the test cases.
This paper provides some insights into the research behind HANA
http://www.sigmod09.org/images/sigmod1ktp-plattner.pdf
regards
Yeb
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