Hi Dyan,

There are no theoretical limitations on the number of tables and the number of items per table that can be handled in each session.

The limits arise from a performance perspective, where the client's CPU could become the main bottleneck when subscribing to a high number of items. The actual limit is determined by several aspects:
- the average and peak update frequencies for the subscribed items
- the client hardware
- the client technology (JavaScript, Java, Flex, etc.)
- the client-side elaboration (how the update events are displayed on the front-end, with what graphical effects, etc.).

So it is impossible to provide general guidelines on the maximum number of items or tables that can be subscribed to by a single client (session). A simulation could help you find this limit for your specific application.

Cheers,
Alessandro