« on: February 20, 2015, 11:17:24 AM »
Thereby creating multiple catalogs can make little sense unless you have a very good reason to do so - it can make sense for example to have a "personal" one, and a "professional" one if you want to keep really separated say, your family shots from those you make for your customers - maybe you don't want to show your personal shots to a customer by mistake.
I find performance takes a major hit as catalog size increases, even if it deletes rendered previews on a scheduled basis. Therefore I don't work in my master catalog. I create a new dedicated catalog for each individual shoot or day, depending on the situation. Once I've completed my culling/processing/exporting, I open my master catalog and import the new one to it. This way I rarely have more than a thousand photos within a working catalog.
I have two catalogs - a 200,000 image main catalog and an 800 image test catalog. I can't tell a difference in speed between them.