V6.1 Performance issues and numerous Conencted Users OS Login = SYST

We are having db performance issues, it's slow and people get booted
without error message while printing. If I restart the database, things
go well for a while then it starts to slow down again.

I notice that we have many connected users with TYPE=SERV, OS
Login=SYSTEM. Eventually, there are 39 of these.

We have 22 licensed users, and many are using the ODBC connection to
connect to Vantage.

Any suggestions? Thanks in advance.

Randy Weber