Query Slow For FTS Showing High Scattered Read After Migrate & Upgrade From 12.1.0.2.0 To 12.2.0.1.0 (Doc ID 2322391.1)

Last updated on NOVEMBER 02, 2017

Applies to:

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

Symptoms

Query slow for FTS showing High scattered read after upgrade from 12.1.0.2.0 to 12.2.0.1.0 in target DB and both have same explain plain. Table having CLOB Data. Source DB was in physical server and traget upgraded DB in vBlock using RHEL7 .

Source DB (12.1.0.2.0) - From sqlplus or toad query execute within 1 sec .



Changes

 Changing the storage device and loading data into the table so frequently.

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