Onstat -P

Hello all, I am hoping you can clear up something for me. I am curious about the onstat -P command. The Admin Guide/Manual for 7.3x has one pithy statementabout "display for all partitions the partition number and break up of pages in the buffer pool belonging to the partition". I assume the values are 2k pages. I realize I can map backwards the partnum to the index and data that resides in the buffers at that point in time. Implying that the tables with continuously high index or data would be good candidates for placing into memory (as long as it doesn't cause paging). Of what value and interpretation are the last four lines of summary data: data, btree, other percentages? I assume that it tells me how much of the index vs. data is buffered in memory and would be very useful if I decided to pin tables and indexes into memory. Is there a data/btree ratio that is recommended. We are always at a 70/30 data/index ratio. tia Doug