Is there a recommended size for the iPhoto Library

I have a large iphoto library .. and when I say large i mean it .. over 500GB ... mostly RAW files... over 50,000 images

And even if my system was handlying things great till now .. i7 processor with 16GB of RAM .. I can see the system slowing down a bit lately ..

Wondering if there's a reccomanded library size as I can't find any info .. and yes I know i can break up the library but i don't want to do that ..

I do use Lightroom .. but don't like the way it organize things .. and also use Aperture .. but ... not impressed at all .... and having a feeling Apple will soon pass it out .. no, i don't have any inside information .. just my feeling.

I just would like to know if there's a max size in order to avoid a DB corruption .. or something similar.

Or max size for best performances ..

thanks 🙂