Expdp Hangs at Below Stage for long time even in structure backup also .


Database Version: -Oracle Database 12c Standard Edition Release - 64bit Production

so please let me know to get solution & if it is 12c Bug then please mention bug number also

P.S :- here is expdp full script

 expdp username/password full=Y CONTENT=METADATA_ONLY directory=DIR1 dumpfile=structure_backup.dmp logfile=structure_backup.log KEEP_MASTER=Y

Database Size :- 10 GB

  • Thanks for participating on DBA.SE. Please consider reading the following article: How do I ask a good question? (Help Centre). Currently your question doesn't contain enough information and might be closed as unclear what you're asking. For example, could you add the .par file you are using for the export or the exact command? It might be relevant for the answer which objects and/or schemas you are exporting or excluding from export. How large is your database?
    – John K. N.
    Jan 31, 2019 at 7:04
  • Thanks for providing the additional information. Do you receive an error message in the alert_<SID>.log (or the alert log according to your Oracle SID installation)? Is there any information in the structure_backup.log file?
    – John K. N.
    Jan 31, 2019 at 8:29
  • No, i can not find anything in both alert file & structure_backup.log file & structure backup completes it backup but it take 2 hours which is not good
    – Ray
    Jan 31, 2019 at 8:40

1 Answer 1


So in the end it's just a time issue you have. You would have to open up a ticket with Oracle if you want to speed things up. This is probably not an Oracle issue, but possibly an issue with your database design.

You have to understand that the Data Pump Export Utility has to determine all relevant constraints and relations before it can create a valid structured metadata export. This can take a substantial amount of time and depends on the structure of your database, the amount of schemas and other limiting constraints.

The more complex the metadata is, the longer it can take to export.

You might want to look at the object after the .../POST_SYSTEM_ACTIONS/PROCACT_SYSTEM as that could actually be the limiting factor.

You might want to have a look at the official documentation regarding Database Utilities | Data Pump Performance | Tuning Performance (Oracle 12c Documentation) for additional ideas on how to speed up things.

  • ok i will open the ticket. but the thing is it takes a time after 12c up -gradation .by the way thanks for help
    – Ray
    Jan 31, 2019 at 9:00
  • Yes, we have noticed performance differences between exp and expdp too after migrating from 11g to 12c. It doesn't mean that expdp is less performant, just different.
    – John K. N.
    Jan 31, 2019 at 9:20

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