expdp slow after upgrade from 11.1.0.6 to 11.1.0.7

DataPump Export (EXPDP) Runs Very Slow After Upgrade From 11.1.0.6 to 11.1.0.7 (Doc ID 1075468.1) Applies to: Oracle Server - Enterprise Edition - Version: 11.1.0.6 to 11.1.0.7 - Release: 11.1 to 11.1 Information in this document applies to any platform. Symptoms DataPump Export (EXPDP)/Import (IMPDP) runs very slow after upgrade from 11.1.0.6 to 11.1.0.7.  Changes Upgrade to 11.1.0.7 was successful. Database registry shows all components are valid and no invalid objects. No changes in the database.   Cause The import log shows waits for very long time on SYS.SCHEDULER$_EVENT_LOG. From Import.log: Objekttyp DATABASE_EXPORT/SYSTEM_PROCOBJACT/PROCOBJ wird verarbeitet Wait Current Wait Event db file scattered read Current Wait Class User I/O Wait Duration 0 (s) P1 file# E:\ORACLE\ORADATA\DWHPROD...SYSAUX01.DBF P2 block# 1212177 P3 blocks 128 Object SYS.SCHEDULER$_EVENT_LOG Further investigation narrowed down to table SCHEDULER$_EVENT_LOG that allocated huge space in tablespace SYSAUX.. Solution SYS.SCHEDULER$_EVENT_LOG is a system table contains logging information. Here are the options to clear all entries from both the job and window logs: 1) Run in SQL*Plus:  execute DBMS_SCHEDULER.PURGE_LOG(); Or: 2) Run in SQL*Plus: alter table SCHEDULER$_EVENT_LOG shrink space cascade; then monitor with: select * from   (select substr (owner, 1, 10) owner,                substr (segment_name, 1, 30) seg_name,                substr (segment_type, 1, 10) type,                bytes,                extents,                rank() over (order by bytes desc) position         from   dba_segments         where  tablespace_name = 'SYSAUX'         order  by bytes, extents desc) where   position < 10 order   by position; After cleared and purged all scheduler event log entries, DataPump export/import completes in short time.