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12.2 DB HANG DUE TO ROW CACHE LOCK AND ITL ENQUEUE WHEN MORE THAN 250 SESSIONS CONCURRENTLY CREATE TABLES (Doc ID 2635580.1)

Last updated on FEBRUARY 26, 2020

Applies to:

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

Symptoms

A pressure test is implemented in 12.2 and DB hang when we try to create more than 250 sessions and each session will create 50 tables with constraints. But in 10.2.0.4 DB can handle this workload.

The issue can both happen in RAC and non-RAC environment.

In AWR, Wait event 'row cache lock', 'enq: TX - allocate ITL entry' and 'row cache mutex' was significant.

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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