HANA Indicies Ram Consumption

Hey experts,

I played a bit with the indicies in HANA.

When I create a table and it is loaded into memory it needs 3,45GB Ram. After I created some single column indices the table needs 3,55GB Ram. When I delete these indicies the table needs only 2,7GB Ram.

Some pictures for a better understanding... is there a good explanation for it?

By the way is there a table where you can see how much ram is used by which index? I only found M_CATALOG_MEMORY where you can get the aggregated numbers.

After initial table setup with data:

After creation of indicies:

After deletion of indicies:

Thanks

Patrik