Re: Cached plans and statement generalization

From: "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>
To: 'Konstantin Knizhnik' <k(dot)knizhnik(at)postgrespro(dot)ru>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Cached plans and statement generalization
Date: 2017-04-26 01:00:42
Message-ID: 0A3221C70F24FB45833433255569204D1F6EB258@G01JPEXMBYT05
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From: pgsql-hackers-owner(at)postgresql(dot)org
> [mailto:pgsql-hackers-owner(at)postgresql(dot)org] On Behalf Of Konstantin
> Knizhnik
> Well, first of all I want to share results I already get: pgbench with default
> parameters, scale 10 and one connection:
> So autoprepare is as efficient as explicit prepare and can increase
> performance almost two times.

This sounds great.

BTW, when are the autoprepared statements destroyed? Are you considering some upper limit on the number of prepared statements?

Takayuki Tsunakawa

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