Re: insert nologging parallel/noparallel and archiving

From: Gurelei <gurelei_at_YAHOO.COM>
Date: Wed, 14 Aug 2002 06:03:44 -0800
Message-ID: <F001.004B44CD.20020814060344@fatcity.com>

Jack,

I have another twist on this situation. Again I'm loading the tables in nologging mode with all the indices dropped. Both transactions are insert into table nologging (select *). The only difference is that one select is a select from a single table while the other - is a select from two joined tables.

The first insert (from a single) table produce archives, while the other (from two tables) - doesn't.

Is there en explanation for that?

thanks

Gene

• Jack Silvey <jack_silvey_at_yahoo.com> wrote:
  > sorry, meant insert as select, not insert as append
  > --- Jack Silvey <jack_silvey_at_yahoo.com> wrote:
  > > Gene,
  > >
  > > This sounds right.
  > >
  > > Standard insert as append does freelist block
  > > checking
  > > and generates redo. Parallel DML generates
  > minimial
  > > redo, just for the new temp segments being
  > created,
  > > not for the datablock updates. This is one reason
  > it
  > > is so fast.
  > >
  > > Index changes are always logged, even in PDML and
  > > append modes.
  > >
  

  ---

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Author: Gurelei
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Received on Wed Aug 14 2002 - 09:03:44 CDT