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Database Hangs with parallel_degree_policy = AUTO; Serial statement holding JX Enqueue (Doc ID 1333867.1)

Last updated on FEBRUARY 28, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.2 [Release 11.2]
Information in this document applies to any platform.

Symptoms

Intermittently, the PX statement queue becomes hung when parallel_degree_policy = AUTO.   Neither the parallel_target_servers, nor the parallel_max_servers values has been reached, yet statements no longer come out of the PX statement queue.

When the PX queue becomes hung, it can be seen by this query from v$sql_monitor:







Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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