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Home -> Community -> Usenet -> c.d.o.server -> oracle datamart - partioned views
Have a datamart (star scema) about 4M rows in the fact. Performance sucked, so I broke it into 8 tables and partioned viewed. they SUCK!
I turned the ora.init parameter on.
I constraied each table on the first part of the prim key. (time).
I created a union all view.
Oracle 7.3 HP 1 GB ram and 2 processors
I then ran a query and - no matter the where clause it will hit every
table. Even if I say where time_key = 3. No matter what. If the
elimination of tables dosen't work then the benefits of severly
minimined.
True this will allow me to scan the table quicker (8x). But i need
more!
I'm running redbrick on the same box - ported the datamart over in 2
hours. Redbrick kicks the crap out of oracle. Maybe oracle is not
ready
for warehousing! - I'm going to oracle 8 soon any body know if oracle 8
is
any better.
I'm about to put oracle back in the box and burn it.
I appreciate comments from anyone who has had partion view work to eliminate tables! or actually built a 'REAL' datamart in oracle and had oracles star execution path kick in w/o hints and had it return a result set in a reasonable time frame (< 15 secs).
Thanks for any comments / knowledge!
* please e-mail me with any info,
Dave.
dgray_at_bdsinc.com
-------------------==== Posted via Deja News ====----------------------- http://www.dejanews.com/ Search, Read, Post to UsenetReceived on Mon Sep 29 1997 - 00:00:00 CDT
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