9.2.0 Performance slowdown with ORA-6512 SYS.DBMS_ALERT ORA-12152 ORA-20000 ORU-10015 and multiple trace files
Last updated on SEPTEMBER 02, 2017
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 9.2]
Information in this document applies to any platform.
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 ...
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.
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