It may be that your fast refresh is actually doing a lot of work. This
would happen if many rows in the source table were changed. If 99% of the
rows changed, then a complete refresh will be faster, because you don't have
the added overhead of reading the logs to determine which rows to refresh -
you just refresh them all.
If only 1% of the rows changed then the fast refresh will indeed be fast -
faster than a complete refresh.
Somewhere in between there's a break even point. It may be that many rows
have changed - enough to take you past the break even point.
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Tuesday, August 28, 2001 3:00 PM
> We've noticed that our fast refresh takes longer than complete refresh -
and
> that's puzzling .We have MV logs based on the PK of the FACT table - and
the
> MV's are JOIN ONLY .
> Any suggestions would be welcome !
>
> vikas
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Vikas Kawatra
> INET: [EMAIL PROTECTED]
>
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Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Greg Moore
INET: [EMAIL PROTECTED]
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