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gv$ view query fails on RAC with ORA-12850 if sessions_per_user is set to 1 in user profile on 18c or above (Doc ID 2727326.1)

Last updated on NOVEMBER 26, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 18.3.0.0.0 and later
Information in this document applies to any platform.

Symptoms

+ On RAC, querying any gv$ view fails with ORA-12850 error if the SESSIONS_PER_USER is limited to 1 only in the user profile.

+ This does not happen on a standalone database, only on RAC.

+ This error is not reported on 12.1 or 12.2.

+ It seems that the query is executed in parallel. The error is reported while trying to spawn a new parallel query slave.

+ Disabling the parallel query does not help.

+ Increasing the sessions_per_user to 2 works around the error.


Testing on a 3-node RAC database:

There is no error on 12.1.0.2.

 

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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