How to check SAP client size and number of tables?

We can get the client size using 2 SAP standard reports:

1. RSSPACECHECK
2. RSTABLESIZE

Go to SA38/SE38 and execute one of these reports in background with below selection:

In the spool of the job, we will see the client size in both the reports.

How to check the number of tables in a client ?

RSSPACECHECK will provide the number of Tables in that particular client along with the required size.