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EXADATA : DATABASE HANG ON CELL SMART TABLE SCAN'<='PX DEQ: EXECUTE REPLY in 12C (Doc ID 2362938.1)

Last updated on FEBRUARY 20, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.2.0.1 [Release 12.1 to 12.2]
Oracle Exadata Storage Server Software - Version 11.1.3.1.0 to 11.2.3.2.2 [Release 11.1 to 11.2]
Information in this document applies to any platform.

Symptoms

Database performance decreased noticeably after upgrade to 12.1.

Hang Analyzer shows multiple parallel queries waiting on 'CELL SMART TABLE SCAN'<='PX DEQ: EXECUTE REPLY'

Cell image version is below version 11.2.3.3.0.

Changes

Database was recently upgraded to 12.1.

 

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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