Hi,
I have 8 oracle instances with an only user for every instance.
My customer asked me to create an only instance with 8 tablespaces and 8 different users.
These instances could also further increase.
I think that avoiding creating all these tablespaces on an only instance, because I think that it would be possible to have a reduction of the performances, considering that the tablespaces INDX, TEMP and SYSTEM are the same.

According to you what problem would it be possible to verify afterwards doing an operation of the kind?

Thanks
Raf