RE: Performance tuning

Sorry - that's what I meant. No archive log generation. NOT no redo log generation. Thanks for pointing that out. Is it Friday yet?

Jim

> Why putting DB in noarchivelog will avoid redo generation? There will be
no
> archiving, but redo will continue to be generated.
>
> Alex Hillman
>
> -----Original Message-----
> Sent: Wednesday, May 30, 2001 10:21 AM
> To: Multiple recipients of list ORACLE-L
>
>
> Azhar,
>
> Just two thoughts off the top of my head to improve loading of records:
> 1. Put database in noarchivelog mode to avoid redo generation (if
> possible).
> 2. Drop all indexes on target tables (if possible), then load data, then
> recreate all indexes on target tables.
>
> Jim
>
> Jim Hawkins
> Lead SAPR/3 Oracle Database Administrator
> MEMC Electronic Materials, Inc.
> 600 Pearl Drive
> St. Louis, MO 633376
> 9636) 474-7832
> jhawkins_at_memc.com (work)
> jhawkins_at_primary.net (home)
>
> >
> > HI ALL,
> > We have to load almost 3 millions records of average row size of 150
> bytes.
> > We are importing data using sqloader with ROWS=4000 and
bindsize=8450000 .
> > We have adjusted the rollback segment to almost 10 m with 8 extents
> enough
> > for single transaction size and considering 30% rollback overhead. We
> > adjusted the OPTIMAL TO 10 M to have avoid rollback extension
> > Rollback segment, databuffer cache have hit ratio of 100%.
> >
> > The loading was fast only for first 10 commits but then it slowed like
> > snail. LOADING TOOK 22 hours in the first run on ORACLE8i NT4 128 megs
RAM
> > .
> > SGA figures in M :
> > NAME VALUE
> > -------------------- ---------
> > Fixed Size .0676384
> > Variable Size 239.02734
> > Database Buffers 39.0625
> > Redo Buffers 7.8203125
> > ---------
> > sum 285.97779
> > ( we can't use direct path due to functions in sqlldr controlfile). .
> > Couldn't figure out the bottleneck yet.
> > Any ideas.
> > TIA
> > Azhar Siddiq,
> > DBA
> > LMK Resources
> >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > --
> > Author:
> > INET: azhar_at_mathtech-pk.com
> >
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> >
>
>
> --
> Jim Hawkins
> Lead SAPR/3 Oracle Database Administrator
> MEMC Electronic Materials, Inc.
> 600 Pearl Drive
> St. Louis, MO 633376
> 9636) 474-7832
> jhawkins_at_memc.com (work)
> jhawkins_at_primary.net (home)
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Jim Hawkins
> INET: jhawkins_at_primary.net
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing Lists
> --------------------------------------------------------------------
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Hillman, Alex
> INET: Alex.Hillman_at_usmint.treas.gov
>
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> San Diego, California -- Public Internet access / Mailing Lists
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>

-- 
Jim Hawkins
Lead SAPR/3 Oracle Database Administrator
MEMC Electronic Materials, Inc.
600 Pearl Drive
St. Louis, MO  633376
9636) 474-7832
jhawkins_at_memc.com (work)
jhawkins_at_primary.net (home)

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jim Hawkins
  INET: jhawkins_at_primary.net

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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