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AQ : CJQ Scheduler Related Process Not Working As Expected / ORA-4030 Errors (Doc ID 1469803.1)

Last updated on MARCH 07, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3 [Release 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

RAC environment;

The processing of messages which are connected with schedular jobs may be slow;

cjq0 process may be consuming a large amount of memory;

This process may also be encountering ora-4030 errors.

Collecting a heapdump for the problematic CJQ0 process:

sqlplus /nolog
conn / as sysdba
alter system set max_dump_file_size=unlimited;

oradebug setospid <OSpid for cjq0>
oradebug unlimit
oradebug dump heapdump 536870917
oradebug tracefile_name (shows the path and filename information)
oradebug close_trace (closes the trace file)
exit

It shows large allocations for "JskrParsePayloa"

Cause

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In this Document
Symptoms
Cause
Solution
References


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