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Query Hangs During Parse And Is Causing High Memory Consumption Or ORA-04030 error (Doc ID 2854278.1)

Last updated on JULY 20, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 19.9.0.0.0 and later
Information in this document applies to any platform.

Symptoms

On 19c a statement with a complex CASE clause cause the session to allocate huge amounts of PGA, exhausting all the server memory.
This is happening in parse phase even before oracle check the objects referenced in the statement.

Long parse time queries and deeply nested queries is causing high memory consumption or ORA-04030 error .

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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