Re: Review: Revise parallel pg_restore's scheduling heuristic
От | Tom Lane |
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Тема | Re: Review: Revise parallel pg_restore's scheduling heuristic |
Дата | |
Msg-id | 16987.1248875614@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | Re: Review: Revise parallel pg_restore's scheduling heuristic (Robert Haas <robertmhaas@gmail.com>) |
Ответы |
Re: Review: Revise parallel pg_restore's scheduling
heuristic
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Список | pgsql-hackers |
Robert Haas <robertmhaas@gmail.com> writes: > On Tue, Jul 28, 2009 at 9:52 PM, Tom Lane<tgl@sss.pgh.pa.us> wrote: >> I don't have time to look right now, but ISTM the original discussion >> that led to making that patch had ideas about scenarios where it would >> be faster. > This is what I've been able to find on a quick look: > http://archives.postgresql.org/pgsql-hackers/2009-05/msg00678.php > Sounds like Kevin may want to try renaming some of his indices to > produce intermingling... Also, the followup to that message points out that the 8.4.0 code has a potential O(N^2) dependency on the total number of TOC items in the dump. So it might be interesting to check the behavior with very large numbers of tables/indexes. regards, tom lane
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