Friday, November 20, 2015

ORA-600 [729] "UGA Space Leak"

ORA-600 [729] "UGA Space Leak"

REFERENCE :

Oracle Support Doc ID 31056.1)

ERROR:             

  Format: ORA-600 [729] [a] [b]

Effected Versions:  
       
  versions 11.2.0.3 ( and below)  MEMORY COMPONENT


PROBLEM DESCRIPTION:       

A space leak has been detected in the User Global Area (UGA).   There is NO data corruption as a result of this error.  It is an internal memory housekeeping problem.


IMPACT:   
         
PROCESS FAILURE - But only during logoff of dedicated process so impact is minimal.
NON CORRUPTIVE - No underlying data corruption.



SOLUTIONS:       

Event 10262 can be set to safely ignore small memory leaks.

Set the following in init.ora for example to disable space leaks less than 4000 bytes:

  event = "10262 trace name context forever, level 4000"

then stop and restart the database.

Repeated errors or large memory leaks can be diagnosed further by Sending the alert.log and trace files to Oracle support.




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