Re: how to improve impdp

  • From: Norman Dunbar <oracle@xxxxxxxxxxxxxxx>
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Wed, 17 Jul 2013 09:48:07 +0100

Morning Joan,

On 16/07/13 21:39, Hsieh, Joan wrote:
> I have managed to drop all the tables and all views, it is much faster than 
> drop user cascade.  However, there are a lot of  SYS_LOB%$$
> LOBSEGMENT left. I couldn't find any drop statement to drop all these LOB 
> objects. Does anyone know how?

I have seen this very problem on 11.2.0.3 numerous times. If you query 
DBA_OBJECTS then you will see the LOB Segments still present.

However, they are actually in the recycle bin, so:

purge dba_recyclebin;

if you are a SYSDBA type user will clear them out. If you are a normal 
users then

purge recyclebin;

will clear out the ones owned by your current user.

It drove me nuts for ages until I sat down and figured out where these 
things were actually "living" after I had dropped the tables. Funny 
thing was, I drop the tables with PURGE to bypass the recycle bin - but 
the LOBs seem to like the bin and stick around until purge time. I have 
no idea why this happens.

HTH

Cheers,
Norm.

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Norman Dunbar
Dunbar IT Consultants Ltd

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