RE: dba_extents view in Oracle 10.2.0.2

Sorry if this is a duplicate post.

I got a workaround from oracle - create a new view called dba_extents_wa and use it instead of dba_extents.
Our EDS team confirmed that the performance was indeed better using dba_extents_wa view (compared
with old dba_extents). Oracle did not recommend to replace the dba_extents because - as I understood -
they have not tested this new view completely. I can post the SQL to create dba_Extents_wa if anyone is
interested.

Thanks to all who replied to my posts

Gene Gurevich

                                                                           
             "Allen, Brandon"                                              
             <Brandon.Allen_at_On                                             
             eNeck.com>                                                 To 


                                       <Dave.Herring_at_acxiom.com>,          

             06/26/2006 10:40          <genegurevich_at_discoverfinancial.com 
             AM                        >, "oracle-l"                       


                                       <oracle-l_at_freelists.org>            

                                                                        cc 
                                                                           
                                                                   Subject 
                                       RE: dba_extents view in Oracle      
                                       10.2.0.2                            
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           

I've had similar problems in 10.2.0.2 recently with a known bug (Metalink notes 5103126, 4618615 & 5130698) causing slowness with the following recursive query:

select c.name, u.name from con$ c, cdef$ cd, user$ u where c.con# = cd.con# and cd.enabled = :v1 and c.owner# = u.user#

• which is executed everytime you (or your app) tries to insert a duplicate into a unique constraint and triggers ORA-00001. This can be a big problem if you have an app that tries to do this regularly. Anyway, the workaround was to delete stats on cdef$, user$ and con$ and lock them. So far, this has cleared up the problem with no known side effects.

Regards,
Brandon

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