9.2.0 Performance slowdown with ORA-6512 SYS.DBMS_ALERT ORA-12152 ORA-20000 ORU-10015 and multiple trace files (Doc ID 1063366.1)

Last updated on MARCH 12, 2019

Applies to:

Symptoms

Multiple Errors seen including several trace files generated consecutively and persistently as referenced in the ALERT.LOG.

• User performance degrades during these same periods of time
• Several client connection or network error messages are seen during this time period

Reviewing the ALERT.LOG and trace files you fill find references similar or identical to the following:

ORA-20000: ORU-10015: error:3 waiting for pipe message.
ORA-06512: at "SYS.DBMS_ALERT", line 148
ORA-06512: at "SYS.DBMS_ALERT", line 281
ORA-06512: at line ...

Changes

It is difficult to tell if the connection problems are the source or the symptom of the problem:
That stated the multiple trace files and connection issues are seen together leading to not only the obvious connection problems, but the less understandable performance problems.

Cause

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