When the update is completed, it reports that statistics have been updated for all tables. StmtCompleted Statement within a stored procedure has completed. StmtStarting Statement within a stored procedure has started. 0 - Avg. Best count is the ideal number of extent changes if everything is contiguously linked.
Actual count is the actual number of extent changes.
Scan density is a percentage. 8094.0 - Avg. The isolation property is one of the four ACID properties a logical unit of work must display to qualify as a transaction. It is the ability to shield transactions from the effects of updates performed by other concurrent transactions. The level of isolation is actually customizable for each transaction.