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Re: Performance gain from reduction of GROUP BY memory

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>,Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Performance gain from reduction of GROUP BY memory
Date: 2005-08-30 14:52:09
Message-ID: 21684.1125413529@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-announcepgsql-hackers
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Alvaro Herrera wrote:
>> On Tue, Aug 30, 2005 at 10:23:49AM -0400, Bruce Momjian wrote:
>>> I don't usually document internal API changes in the release notes. 
>>> Should I?
>> 
>> Doesn't this potentially affect user-defined aggregates?

> I read it as something that _could_ be used by user-defined aggregates,
> but not something that would require a changes to a user-defined
> aggregate.

I tend to agree with Bruce here.  If he documented changes of this size
the release notes would be twice as long and even fewer people would
read them.

			regards, tom lane

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