STATUS=ACTIVE and LAST_CAL_ET= Consistently Increasing

We have 100 sessions open through parallel executions maigrating 7 million of customer data.

The status of these sessions are 'ACTIVE' BUT the Last_Call_ET (the Idle Time) is increasing (see the result below). I tried to tracing (10046) the SID but the DB is not generating any trace files in udump.


SID SERIAL# USERNAME OSUSER PROGRAM COMMAND STATUS LAST_CALL_ET
---------- ---------- -------------------- -------------------- ------------------------------ ---------- -------- ------------
5463 137 MIGRATION ims oracle@uludag (P044) 6 ACTIVE 676


Question:

1) When last_call_et is showing a high value and increasing consistently, why does the STATUS is showing 'ACTIVE'?

2) Is there any other way, I could see what the session is doing?

Regards

May be it's doing waiting for something, could be I/O wait and that's why it's increasing.

Quote:

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We have 100 sessions open through parallel executions maigrating 7 million of customer data.

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Do you really need 100 sessions to migrate 7 Million rows? I doubt it.
Try with single session.

The v$sess_io is the best monitoring view to know about IO performance of the running session.