Re: Proposed Query Planner TODO items

Hi,

Thanks for the info. Would you give me the tarball?
--
Tatsuo Ishii

> Hi Tatsuo,
>
> Yes, I've been updating the dbt3 kit over the past several months.
> The query time graph is a new feature. It's available via BitKeeper
> at bk://developer.osdl.org:/var/bk/dbt3 but I haven't tested the kit
> well enough to make a v1.5 release yet. If BitKeeper isn't something
> you can use, I can make a preliminary tarball for you.
>
> Mark
>
> On Mon, Oct 25, 2004 at 01:59:46PM +0900, Tatsuo Ishii wrote:
> > Mark,
> >
> > I see nice graphs for each DBT3 query(for example,
> > http://developer.osdl.org/markw/dbt3-pgsql/42/q_time.png) It seems
> > they do not come with normal dbt3-1.4 kit. How did you get them?
> > Maybe you have slightly modified dbt3 kit?
> > --
> > Tatsuo Ishii
> >
> > > On 6 Feb, To: tgl(at)sss(dot)pgh(dot)pa(dot)us wrote:
> > > > On 5 Jan, Tom Lane wrote:
> > > >> Josh Berkus <josh(at)agliodbs(dot)com> writes:
> > > >>> 2) DEVELOP BETTER PLANS FOR "OR GROUP" QUERIES
> > > >>
> > > >>> Summary: Currently, queries with complex "or group" criteria get devolved by
> > > >>> the planner into canonical and-or filters resulting in very poor execution on
> > > >>> large data sets. We should find better ways of dealing with these queries,
> > > >>> for example UNIONing.
> > > >>
> > > >>> Description: While helping OSDL with their derivative TPC-R benchmark, we ran
> > > >>> into a query (#19) which took several hours to complete on PostgreSQL.
> > >
> > > http://developer.osdl.org/markw/dbt3-pgsql/
> > >
> > > There's a short summary of the tests I ran over the weekend, with links
> > > to detailed retults. Comparing runs 43 (7.4) and 52 (7.5devel), it
> > > looks like query #7 had the only significant improvement. Oprofile data
> > > should be there too, if that'll help. Let us know if there's anything
> > > else we can try for you.
> > >
> > > Mark
> > >
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>
> --
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