Solution : https://service.sap.com/sap/support/notes/1887235 (SAP Service marketplace login required)
Key words :
customer component bc-db-ora oracle priority recommendations / additional info category external error validity, description------------------------------------ ---------- ---------------------------------_securefiles_concurrency_estimate 12 securefiles concurrency estimateto avoid performance problems caused, solution oracle hidden parameter _securefiles_concurrency_estimate, tx - contention' wait events leading, high 'buffer busy waits' & 'enq, causing database performance degradation, database performance degradation [id 1532311, / __%pdfstyle%__font-size, __%pdfstyle%__ / } symptom, sql> alter system set