connect_cached()
DBI->connect_cached(DBI:server:database[:host:port],username,password[, \%attri])
This method is similar to connect(),
except that the database handle is stored in a hash with the given
parameters. This allows the database handle to be reused if
connect_cached() is called again. You can
access and eliminate a cache with the CachedKids
attribute. This method can cause problems with a database system by
inadvertently opening too many connections.