Re: Very slow metadata-only expdp

Thanks for your feedback.
We currently have an Oracle SR, and they tried us to apply a few patches, but none of them have helped so far.  Is it possible for someone in this community to try an export similar to below and provide their findings? It probably needs to be at least a decent size large system for the issue to reproduce.

For our tests, we've been using ~3TB DB and we see the slowness, but the real requirement is on a ~160TB prod DB.

expdp userid=system/<passwd> DIRECTORY=DP_DIR LOGFILE=expdp_CONSTRAINT_ONLY.log DUMPFILE=expdp_CONSTRAINT_ONLY.dmp FULL=y METRICS=Y CONTENT=METADATA_ONLY INCLUDE=CONSTRAINT

-Thanks in advance

    On Thursday, October 20, 2016 11:12 PM, Mladen Gogala <gogala.mladen_at_gmail.com> wrote:  

  There are several bugs listed in the master note:  

https://blogs.oracle.com/db/entry/master_note_for_data_pump_doc_id_12647151  

 Also, when you google for "oracle expdp slow", you will get a lot of hits, one of them from always helpful Mike Dietrich:  https://blogs.oracle.com/UPGRADE/entry/data_pump_imdp_over_network  

 It is worth researching some of those hits, since they come from some very good people. Also, the problem may be in using wrong plans when accessing SYS tables. When exporting metadata only, you are only accessing SYS tables. Try running data dictionary statistics and gather system statistics.  That may help.  

 Regards        

 On 10/19/2016 04:12 PM, Deepak Sharma (Redacted sender sharmakdeep_oracle for DMARC) wrote:   

     I guess I should rephrase the real issue wrt the export of metadata. expdp userid=system/<passwd> DIRECTORY=DP_DIR LOGFILE=expdp_CONSTRAINT_ONLY.log DUMPFILE=expdp_CONSTRAINT_ONLY.dmp FULL=y METRICS=Y CONTENT=METADATA_ONLY INCLUDE=CONSTRAINT        

 --
Mladen Gogala
Oracle DBA
Tel: (347) 321-1217      

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http://www.freelists.org/webpage/oracle-l Received on Fri Oct 21 2016 - 06:32:27 CEST