From: Vitalii Tymchyshyn <tivv00@gmail.com>
To: Stefan Keller <sfkeller@gmail.com>
Cc: pgsql-performance@postgresql.org, Tomas Vondra <tv@fuzzy.cz>
Subject: Re: PostgreSQL-related topics of theses and seminary works sought (Was: Hash index use presently(?) discouraged...)
Date: Mon, 19 Sep 2011 12:37:29 +0300
Message-ID: <4E770D59.3090906@gmail.com> (raw)
In-Reply-To: <CAFcOn28VoOwGNQJA=qLGXCpxa5p3q-Twqsq8KNBOBX33Cf8u2A@mail.gmail.com>
References: <CAFcOn28VoOwGNQJA=qLGXCpxa5p3q-Twqsq8KNBOBX33Cf8u2A@mail.gmail.com>
17.09.11 23:01, Stefan Keller написав(ла):
> * more... ?
What I miss from my DB2 UDB days are buffer pools. In PostgreSQL terms
this would be part of shared buffers dedicated to a relation or a set of
relations. When you have a big DB (not fitting in memory) you also
usually want some small tables/indexes be in memory, no matter what
other load DB has.
Complimentary features are:
1) Relations preloading at startup - ensure this relation are in memory.
2) Per buffer pool (or relation) page costs - tell it that this
indexes/tables ARE in memory
Best regards, Vitalii Tymchyshyn.
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To: pgsql-performance@postgresql.org
Cc: tivv00@gmail.com, sfkeller@gmail.com, tv@fuzzy.cz
Subject: Re: PostgreSQL-related topics of theses and seminary works sought (Was: Hash index use presently(?) discouraged...)
In-Reply-To: <4E770D59.3090906@gmail.com>
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