I'd say it depends on the persistence method you use. Cookie Persistence won't create a record in the persistence table, since the information is stored on the client, inside the cookie.
For universal persistence K7392: Overview of universal persistence says:
"Note: The BIG-IP system stores universal persistence records in Traffic Management Microkernel (TM) memory, and there is a limit. The total amount of persistence records that they system can store is dependent on the available TMM memory."
So for universal persistence - the more memory, the more records you can store.
Hope this helps.