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ORA-23603 'STREAMS enqueue aborted due to low SGA' Error from Streams Propagation, and V$STREAMS_CAPTURE.STATE Hanging on 'Enqueuing Message' (Doc ID 745601.1)

Last updated on DECEMBER 10, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.1 to 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 Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.


Streams propagation between two 10.2 databases keeps halting with error:

ORA-23603: STREAMS enqueue aborted due to low SGA

Increasing memory available to Streams helps for a short time - messages start flowing, but then everything
stops again and propagation fails with the same ORA-23603 error.  Memory allocated to Streams is excessive, yet the problem continues.  The state of the capture process according to V$STREAMS_CAPTURE is 'Enqueuing Message'.

This note is only intended to discuss one potential cause of the ORA-23603 error: the initialization parameter AQ_TM_PROCESSES being explicitly set to '0'. Please note that there are reasons that an ORA-23603 error can occur, such as inadequate memory or excessive queue spilling, but these reasons are not treated in this note.


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