Oracle 12c

for 5, just run the swe query in sqlplus while the load is running

you'll visually see which sql's are running
if the same query keeps showing, then that's the one you need to tune

you don't really those expensive items like ASH, AWR  from the tuning pack

Hi Geert,

Since your SQL is a join of v$session it won't show data for recent past.
Thats why I requested that.

It is a good way to drill down to the absolute second, which leads to correction to_char(sample_time,'mmddrr hh24:mi:ss')

Thanks all.

I am trying out the various solutions posted here. Will get back to you soon

Sorry for delay in getting back. I got side tracked from this

@sdstuber I think the database is a pluggable database as per v$database. CDB value is set to NO. But there are no other databases connected so I am assuming all the resources are used by this database?

@slightvw I modifed the session to use the optimizer feature to the previous version. Didnt see any significant improvements there

Also we are collecting the statistics everyday after the batch is complete in both the environments (12c and 11g). So the stats on the table are upto date. Is there anything I should look into. The program I am using to bench mark uses a parallel ppelined function to load 24 million rows into a current year partition of table which has 130 columns. It bulk collect into source and associative arrays are used for lookups. The partition index is made unusable before the start of the process and rebuild after loading. The process takes 16-18 min in 11g where has 28-30 min in 12c..

Please let me know if you think any other place I need to look into

Thanks

I will open a new thread as a continuation of this with last my comment as op. The issue is still there and do not what could be causing this