High Direct Path Read On LOB Operation After 12.2 Upgrade

(Doc ID 2354518.1)

Last updated on JANUARY 31, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.2.0.1 and later
Information in this document applies to any platform.

Symptoms

After upgrading DB from 11.2.0.4 to 12.2.0.1, dbms_lob.substr shows performance issue with lots of direct path read.

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms