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12.2 / Exadata : Session connect/disconnect & performance issue

Hello,

I have an Oracle job that is having performance issue.

The ADDM findings is : "session connection / disconnection"

In this job, there is only one active main session with the same SID, SERIAL #

Can a session disconnect and reconnect with the same SID / SERIAL #? Is it possible ?

How to diagnose this problem ?

See attached file.

Thanks.

GD.


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