BPC fact table settings in BW

Hi.

This is mostly a BW question, but indeed related to BPC, which is why I did ask it here.

In BW, when you create applications in BPC, there will be created two fact tables E and F in BW as a BW dictionary table.

This fact tables is by BPC created with the technical settings for logical storage parameters:

Data Class: DFACT

Size Category: 4 (expected data records 500.000 to 2.100.000)

Now my question is, will it do any difference to performance if we change the size category?

We do have around 30.000.000 records in our E-fact table.

Best regards

Mogens Smerdel