
500 6.3 Monitoring Exchange 2003 Performance
percent or more could cause you to dedicate a lot of time, effort, and hard-
ware to get, ultimately, a result that users will not really value.
There are three performance counters in this object that do not relate
directly to performance but are extremely important in establishing trends
and trying to define a user profile. One is the “Single Instance Ratio,”
which describes the average number of references to messages in the mail-
box store(s), and the other two are “Total Count of Recoverable Items” and
“Total Size of Recoverable Items,” which describe the quantity of informa-
tion deleted by the users (therefor ...