X

Alejandro Vargas' Blog

  • February 20, 2007

Export and Import Schema Statistics Between Databases

Alejandro Vargas
Technical Leader, ACS Global Delivery, Infrastructure & BigData

The Export / Import schema statistics procedure included here best suit 8i, 9i databases where dbms_stat.export_schema_stats may fail with some objects, leaving the stats export incomplete.

A case where a production database process suddenly experiences a drastic performance degradation may be related to changes on the information available for the optimizer.

I have seen several times that restoring previous statistics has solved this kind of problem.
That was the case yesterday when a critical department was not able to work for several hours, until older statistics were restored .

This problem also raises the issue of having a source of the previous statistics available for use. Exporting the statistics out to an export file before running the cyclic statistics gathering job can be added to the DBA toolkit.


Be the first to comment

Comments ( 0 )
Please enter your name.Please provide a valid email address.Please enter a comment.CAPTCHA challenge response provided was incorrect. Please try again.