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Size of State Objects (ktlbk) Keeps Increasing Till 4031 is Thrown (Doc ID 1638733.1)

Last updated on FEBRUARY 04, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

Many 4031 errors are reported:
ORA-04031: unable to allocate 32 bytes of shared memory ("shared pool","unknown object","KGLH0^9f4ac8c0","kglHeapInitialize:temp")
ORA-04031: unable to allocate 32 bytes of shared memory ("shared pool","unknown object","KGLH0^ae1da3c","kglHeapInitialize:temp")

The database is running, but the state objects in the shared pool keep on increasing:

select  bytes, sysdate from v$sgastat where name like 'state o%';

425968 20/03/2014 12:58:02
37831768 20/03/2014 12:59:17
51050968 20/03/2014 12:59:48
60596008 20/03/2014 13:00:21
95251048 20/03/2014 13:02:13
123779248 20/03/2014 13:03:46
157915888 20/03/2014 13:05:59
216268288 20/03/2014 13:10:45
303839008 20/03/2014 13:15:56
365693848 20/03/2014 13:20:01
399075568 20/03/2014 13:21:43

As one can be seen from the heap dump you see that these are from the "ktlbk" (List of blocks) state objects.

 

Changes

Nothing

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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