RE: RE: tuning a massive delete

create table ani_prx_faster parallel (degree 5) nologging

    as

     select b.*
     from bo_owner_master.ani_prx b,
          bo_owner_stage.ani_prx a
     where a.cusip = b.cusip (+)
       and a.fund_no = b.fund_no (+)
       and a.add_cymd = b.add_cymd (+)
       and nvl(b.ba_reccode, 'X') != 'V'
     and b.cusip is null

This query I got from here I got only 638k, and I have 27m records in my file and there are 17m deletes. so 12m records left. Also all the records are null????

what do i need to change?
>
> From: "Mladen Gogala" <mladen_at_wangtrading.com>
> Date: 2003/09/17 Wed PM 02:19:40 EDT
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> Subject: RE: RE: tuning a massive delete
>
> Well, large sort area size would certainly help, as well as the parallel
> hints.
> As for the bitmap index, I din't know what was the percentage. It probably
> wouldn't
> help much.
>
> --
> Mladen Gogala
> Oracle DBA
>
>
>
> > -----Original Message-----
> > From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On
> > Behalf Of rgaffuri_at_cox.net
> > Sent: Wednesday, September 17, 2003 1:25 PM
> > To: Multiple recipients of list ORACLE-L
> > Subject: Re: RE: tuning a massive delete
> >
> >
> > i tested the minus in the explain plan and the estimate was
> > very large. dont i need a large sort_area_size for that?
> >
> > bitmap index on all columns right? not just one?
> > >
> > > From: "Mladen Gogala" <mladen_at_wangtrading.com>
> > > Date: 2003/09/17 Wed PM 12:59:40 EDT
> > > To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> > > Subject: RE: tuning a massive delete
> > >
> > > How abuout:
> > > create table ani_prx_new parallel (degree 5) nologging
> > > as
> > > ( select * from ani_prx
> > > minus
> > > select * from from bo_owner.ani_prx
> > > where ba_recode='V')
> > > /
> > >
> > > I assume that the description of the bo_owner.ani_prx is identical
> > > to the description of the ani_prx. Furthermore, a bitmap index on
> > > ba_owner.ani_prx(ba_recode) would speed things up quite a bit under
> > > favorable circumstances.
> > >
> > > --
> > > Mladen Gogala
> > > Oracle DBA
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: ml-errors_at_fatcity.com [mailto:ml-errors_at_fatcity.com] On
> > > > Behalf Of rgaffuri_at_cox.net
> > > > Sent: Wednesday, September 17, 2003 11:45 AM
> > > > To: Multiple recipients of list ORACLE-L
> > > > Subject: tuning a massive delete
> > > >
> > > >
> > > > i have a table with 27 million records that is about 1.2 GB
> > > > in size. I have a 'staging table' with 18 million records. 16
> > > > million records have a 'delete' flag. I have indexed the
> > > > column in staging with a delete flag. both tables have
> > > > indexed primary keys. Is the following my fastest option or
> > > > would an 'IN' be faster? Im concerned because this has been
> > > > running for a while and have alot of consistent gets but no
> > > > 'writes' yet which tells me its still building the join. Our
> > > > sort_area_size is rather small and Im not allowed to change
> > > > it which tells me we are swapping to the temp tablespace.
> > > >
> > > > anyway to speed this up? or is this the fastest we got?
> > > >
> > > >
> > > > create table ani_prx_new parallel (degree 5) nologging
> > > > as select *
> > > > from ani_prx b
> > > > where not exists (select 1 from bo_owner_stage.ani_prx a
> > > > where ba_reccode = 'V' and a.cusip = b.cusip and a.fund_no =
> > > > b.fund_no and a.add_cymd = b.add_cymd)
> > > >
> > > > --
> > > > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > > > --
> > > > Author: <rgaffuri_at_cox.net
> > > > INET: rgaffuri_at_cox.net
> > > >
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> Author: Mladen Gogala
> INET: mladen_at_wangtrading.com
>
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Author: <rgaffuri_at_cox.net
  INET: rgaffuri_at_cox.net

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