Performance gain from reduction of GROUP BY memory allocations - Mailing list pgsql-hackers

From Simon Riggs
Subject Performance gain from reduction of GROUP BY memory allocations
Date
Msg-id 1125349992.4010.305.camel@localhost.localdomain
Whole thread Raw
Responses Re: Performance gain from reduction of GROUP BY memory allocations  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
In PostgreSQL Weekly News, David Fetter wrote:
> Please test the new beta.  Some of the new features are at
> http://developer.postgresql.org/docs/postgres/release.html#RELEASE-8-1

I notice that Neil's patch regarding reducing the number of memory
allocations during aggregation operations isn't mentioned. It was
originally discussed in 8.0beta (2-3?) time.

What happened there?
- patch not committed in the end
- committed but not mentioned, as a dropped item
- committed but not mentioned, since part of a larger patch

Seemed like a good performance gain to me...

I *have* tried to find this, but Neil's work on memory allocation has
been extensive... (please take the compliment...).

Best Regards, Simon Riggs




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