My Oracle Support Banner

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 to [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.


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)

It shows large allocations for "JskrParsePayloa"


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.