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Peformance got Degreded after cross platform migration from aix to linux 12c

in Database Administration (MOSC) 4 commentsAnswered

Hi Friends,


we have done cross platform migration from aix to linux, after migration the performance of database is highly degraded hence need your immediate suggestion on this.


- Database -- oracle 12c

- Migrated from AIX to linx

- Database size 7tb


i have done below steps for increase the performance but still issue persist.


1- Data dictionary objects stats was stale. I have gathered it.

2- increase the sga from older value of 6gb to 19gb.

3- below is analyze report for reference


Top User Events DB/Inst:


Avg Active

Event Event Class % Event Sessions

----------------------------------- --------------- ---------- ----------

free buffer waits Configuration 30.02 5.68

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