High "transaction rollbacks" value in v$sysstat

I just noticed in a 9.2.0.6 instance on Win2K3 that statspack is reporting a lot of rollback in the "transaction rollbacks" statistic, but a much more reasonable (smaller) value for "user rollbacks":

Statistic                                      Total     per Second    per Trans


--------------------------------- ------------------ -------------- ------------

transaction rollbacks                      3,640,974           31.6          1.3
user calls                               135,007,494        1,172.0         47.4
user commits                               2,845,562           24.7          1.0
user rollbacks                                    21            0.0          0.0

I searched Metalink for bugs but didn't find anything. Is it even possible for these values to be correct? My understanding is that 'transaction rollbacks' is a subset of 'user rollbacks', i.e. URs is incremented everytime a user issues 'rollback' even if there is nothing to actually be rolled back, but TRs is only incremented when actual rollback work is performed. Is my understanding incorrect/incomplete? If so, what could be the cause of all this rollback activity?

Thanks,
Brandon

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http://www.freelists.org/webpage/oracle-l Received on Thu Sep 08 2005 - 18:12:15 CDT