Hi Henning,
We had the same problem. I wrote a small query to retrieve this information. Try running this query from the DBACOCKPIT--> Diagnostics--> SELECT Editor:
SELECT TABLENAME, CACHINGMODE, TABLEID, FILEID
FROM DOMAIN.TABLES
INNER JOIN SYSINFO.FILES
ON TABLEID = FILEID
WHERE CACHINGMODE = 'KEEP'
Regards,
Steve