bstat reports negative numbers/statistic definitions

I am running Oracle 7.3.3 on AIX 4.1 using bstat/estat and getting negative numbers for physical blocks read and written (in the tablespace/datafiles section). The collection is run over night (12 hrs) during our batch processing. I can't figure out how the negative numbers could reflect reality, and ideas?

Also, does anybody know where a description/stats for all of the 7.3.3 sysstats can be found? Received on Thu Mar 12 1998 - 00:00:00 CST