Just checked the statspack.stat_changes procedure and it uses the 'user rollbacks' value in its calculation, not 'transaction rollbacks' as I expected, so Ken's point is valid. Seems to me it would be more meaningful to use 'transaction rollbacks' instead - am I missing something? Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it.