Drop Column Very Slow (Doc ID 1506125.1)

Last updated on DECEMBER 06, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3 [Release 11.2]
Information in this document applies to any platform.
***Checked for relevance on 09-Sep-2016***

Symptoms

Slow alter table drop column in 11.2 database.

10046 (sql_trace) shows a background query responsible for the slow , similar to :

 

  

Cause

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