oracle odbc very slow in ogr/mapserver

Today i converted an adress-table from mysql to oracle (9.2). The data is presented on a map using virtual spatial data over odbc. It appeared the oracle odbc connection was very slow (up to a minute for a couple of records). After a search on google i found some suggestions:
- enable tracing in odbc to see what data is send and recieved (it appeared all the oracle tables where investigated, since there are 100's, it takes a while)
- in this post http://osdir.com/ml/gis.mapserver.user/2004-07/msg00245.html JF presents a solution 4 this by adding the tablename to the DSN-definition in the ovf file
That helped, response time dimished to fractions of a second


ODBC:me/secret@db,table table
wkbPoint

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