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'Heavy swapping observed on system' and TNS-12537 / ns secondary err code: 12560 (Doc ID 2989475.1)

Last updated on DECEMBER 08, 2023

Applies to:

Oracle Database - Enterprise Edition - Version and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.


NOTE: In the document content below, the user information and data used represents fictitious data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product.
Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.

Following is reported in RAC instance alert log:

Application is mainly working on this current RAC instance.

1) Application connections failed

2) After a long time status of listener resource in GI may become 'UNKNOWN'.


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