Re: [RFC, POC] Don't require a NBuffer sized PrivateRefCount array of local buffer pins

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Andres Freund <andres(at)2ndquadrant(dot)com>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [RFC, POC] Don't require a NBuffer sized PrivateRefCount array of local buffer pins
Date: 2014-04-09 13:17:59
Message-ID: CA+TgmoYtXwvF93csLkqtnZTJHWEPa9Dv_W0D8kjzpNqAM9Qygg@mail.gmail.com
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On Wed, Apr 9, 2014 at 8:32 AM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> I've tried to reproduce problems around this (when I wrote this), but
> it's really hard to construct cases that need more than 8 pins. I've
> tested performance for those cases by simply not using the array, and
> while the performance suffers a bit, it's not that bad.

Suspended queries won't do it?

Also, it would be good to quantify "not that bad". Actually, this
thread is completely lacking any actual benchmark results...

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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