High Wait Times For Events 'library cache lock' and 'cursor: pin S wait on X' In Portal Metadata Repository Database When Oracle Access Management Is Configured As Single Sign-On Solution

(Doc ID 2043833.1)

Last updated on NOVEMBER 08, 2016

Applies to:

Portal - Version 11.1.1.1.0 to 11.1.1.6.0 [Release FMW11g]
Information in this document applies to any platform.

Symptoms

In a Fusion Middleware 11.1.1.7 environment with multiple Oracle Portal 11.1.1.6 middletier servers configured with OAM 11.1.2.2, performance degradation was observed while performing performance tests. The performance degradation was observed in the Portal metadata repository database. In the event of a performance drop, the wait events 'library cache lock' and  'cursor: pin S wait on X' accounted for the majority of the overall waiting time in the database. From the information in the ADDM report, the SQL statement 'select * from wwsso_ls_configuration_info$ where 0 = 1' could be associated with the performance drop :

Cause

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