Performance problems with more than 100 databases

I have been had performance problems with a SQL Server
with more than 100 databases.
In SQL Server are there recomendations about how many
databases on same instance?SQL Server wouldn't really have much a problem with 100 databases. The GUI
tools such as the Enterprise Manager sometimes do have problems.
--
Linchi Shea
linchi_shea@.NOSPAMml.com
"Marcos Vinicius" <vinicius@.hepta.com.br> wrote in message
news:082701c38921$7e29caa0$a401280a@.phx.gbl...
> I have been had performance problems with a SQL Server
> with more than 100 databases.
> In SQL Server are there recomendations about how many
> databases on same instance?