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Re: -DCLOBBER_CACHE_ALWAYS shows COPY FREEZE regression problem

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Andres Freund <andres(at)2ndquadrant(dot)com>
Cc: Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: -DCLOBBER_CACHE_ALWAYS shows COPY FREEZE regression problem
Date: 2012-12-07 00:16:23
Message-ID: CA+U5nMK8_P=0kq=-CURnOhb7Fxq1WxhTYFObNfdQYmnpPsb5rg@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers 
On 7 December 2012 00:06, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:

> Apparently the magic to preserve those values across cache resets isn't
> strong enough for this. Seems bad, because that seems to mean a sinval
> overflow leads to this and related optimizations being lost?

Which seems to back up the case for it being a hint, that the system
might not be able to honor.

-- 
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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