| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Andrew Dunstan <andrew(at)dunslane(dot)net>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Review: Revise parallel pg_restore's scheduling heuristic |
| Date: | 2009-07-29 13:53:34 |
| Message-ID: | 16987.1248875614@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Tue, Jul 28, 2009 at 9:52 PM, Tom Lane<tgl(at)sss(dot)pgh(dot)pa(dot)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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