Re: Using quicksort for every external sort run
От | Tomas Vondra |
---|---|
Тема | Re: Using quicksort for every external sort run |
Дата | |
Msg-id | 1457617234.31876.55.camel@2ndquadrant.com обсуждение исходный текст |
Ответ на | Re: Using quicksort for every external sort run (Peter Geoghegan <pg@heroku.com>) |
Ответы |
Re: Using quicksort for every external sort run
Re: Using quicksort for every external sort run |
Список | pgsql-hackers |
Hi, On Mon, 2015-12-28 at 15:03 -0800, Peter Geoghegan wrote: > On Fri, Dec 18, 2015 at 11:57 AM, Peter Geoghegan <pg@heroku.com> wrote: > > BTW, I'm not necessarily determined to make the new special-purpose > > allocator work exactly as proposed. It seemed useful to prioritize > > simplicity, and currently so there is one big "huge palloc()" with > > which we blow our memory budget, and that's it. However, I could > > probably be more clever about "freeing ranges" initially preserved for > > a now-exhausted tape. That kind of thing. > > Attached is a revision that significantly overhauls the memory patch, > with several smaller changes. I was thinking about running some benchmarks on this patch, but the thread is pretty huge so I want to make sure I'm not missing something and this is indeed the most recent version. Is that the case? regards -- Tomas Vondra http://www.2ndQuadrant.com PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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