Re: UUID performance as primary key

On 10/15/10 6:58 PM, Navkirat Singh wrote:
> I am interested in finding out the pros/cons of using UUID as a
> primary key field. My requirement states that UUID would be perfect
> in my case as I will be having many small databases which will link
> up to a global database using the UUID. Hence, the need for a unique
> key across all databases.

You left out one piece of information: How many keys per second do you need?

We put a sequence in the global database that all secondary databases use to get their IDs. It means an extra connect/disconnect (a pooler can minimize this), so if you're issuing thousands of IDs per second, this isn't a good idea. But for a small-ish number of IDs per second, it gets you the benefit of a universal ID without the size of the UUID field.

Craig (the other one)