Support | The zStatusEvent and zObjectInfo tables may grow extremely large over time

I follow the above TID but the tables are still large is this normal ?

select count(*) from zstatusevent where eventid = 'Bundle.FullSysReqEvaluation';
Results at 0

select count(*) from zObjectInfo where id not in (select objinfoid from zStatusEvent);
Results at 0

select count(*) from zstatusevent where eventid = 'Bundle.FullSysReqEvaluation';
Results at 0

The table zStatusEvent ( 1.170,797 MB )
The table zObjectInfo Size ( 3.173,656 MB )

Total Database Size is 11GB

Some information about our environment ( School )
We have 850 devices, 3400 User users.
600 Bundels are associated to students and teachers. They login randomly every 45 minutes.
100 Bundels are associated to teachers and other users. They login randomly some times.
ZCM 11.1 runs on 2 Primary Windows 2008R2 Standard x64 server
And we use a remote SQL server on Windows 2008R2 Standard x64 with SQL2008R2 x64