Re: Proposed Query Planner TODO items

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@sss.pgh.pa.us wrote:
> > > On  5 Jan, Tom Lane wrote:
> > >> Josh Berkus <josh@agliodbs.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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-- 
Mark Wong - - markw@osdl.org
Open Source Development Lab Inc - A non-profit corporation
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