Oracle 8.1.6

Hi Friends..

In normal operation I generate 300 - 400Mb of archive log information a day.

Suddenly.. overnight on Dec31 2001 this increased to 4 - 5GB of archive log information a day.

I used logminer to see what information was being recorded and noticed thousands of internal operations with no sql redo/undo associated with them.

Does anyone know what these operations could be ?

Any help on this would be much apreciated.

Thanks

Suresh