1/ what is the difference between the 2 parameters, and do they need to be set the same? e.g. could I have WARN in one and INFO in the other?
log4j.rootLogger=INFO, S1
log4j.logger.TM1=INFO
2/ i think there is a section in the IBM documentation on including certain messages, but what if I want to exclude messages
e.g. the below message will appear 100s of times for every line returned by a user performs a cube to SQL drill
6624 [f] INFO 2012-08-03 06:16:53.036 TM1.SQLAPI fetched 1 row
..am wondering if there is a command for this..?
...any tips would be much appreciated

Thanks,
Matt