Re: Sorting performance vs. MySQL
От
Yang Zhang
Тема
Re: Sorting performance vs. MySQL
Дата
Msg-id
9066fa251002221035s38a1a72j5a73d301553a72b@mail.gmail.com
Ответ на
Re: Sorting performance vs. MySQL (Pavel Stehule)
Список
Дерево обсуждения
Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Pavel Stehule <pavel.stehule@gmail.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Tom Lane <tgl@sss.pgh.pa.us>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Alban Hertroys <dalroi@solfertje.student.utwente.nl>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Frank Heikens <frankheikens@mac.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Frank Heikens <frankheikens@mac.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Alvaro Herrera <alvherre@commandprompt.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Alvaro Herrera <alvherre@commandprompt.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Sorting performance vs. MySQL Frank Heikens <frankheikens@mac.com>
Re: Sorting performance vs. MySQL Richard Broersma <richard.broersma@gmail.com>
Re: Sorting performance vs. MySQL Frank Heikens <frankheikens@mac.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL "Igor Neyman" <ineyman@perceptron.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Sorting performance vs. MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Sorting performance vs. MySQL Alex Hunsaker <badalex@gmail.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Tom Lane <tgl@sss.pgh.pa.us>
Re: Sorting performance vs. MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Sorting performance vs. MySQL Yeb Havinga <yebhavinga@gmail.com>
Re: Sorting performance vs. MySQL Tom Lane <tgl@sss.pgh.pa.us>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Tom Lane <tgl@sss.pgh.pa.us>
Re: Sorting performance vs. MySQL Alex Hunsaker <badalex@gmail.com>
Re: Sorting performance vs. MySQL Baron Schwartz <baron@xaprb.com>
Re: Sorting performance vs. MySQL John Gage <jsmgage@numericable.fr>
Re: Sorting performance vs. MySQL Scott Marlowe <scott.marlowe@gmail.com>
Re: Sorting performance vs. MySQL Greg Stark <gsstark@mit.edu>
Re: Sorting performance vs. MySQL Yeb Havinga <yebhavinga@gmail.com>
Re: Sorting performance vs. MySQL Greg Stark <gsstark@mit.edu>
Re: Sorting performance vs. MySQL Yang Zhang <yanghatespam@gmail.com>
Re: Sorting performance vs. MySQL Alex Hunsaker <badalex@gmail.com>
On Mon, Feb 22, 2010 at 1:13 PM, Pavel Stehule wrote: > hello > > the speed depends on setting of working_memory. Try to increase a working_memory > > set working_memory to '10MB'; It's already at tpcc=# show work_mem; work_mem ---------- 20000kB (1 row) I also wouldn't have imagined an external merge-sort as being very memory-intensive--wouldn't it only enough buffer space to read 2x and write 1x in big-enough chunks for mostly-sequential access? -- Yang Zhang http://www.mit.edu/~y_z/
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