XADM: Single Instance Ratio Counter Indicates Value Less Than 1
Article ID: 176170
Article Last Modified on 10/28/2006
APPLIES TO
- Microsoft Exchange Server 4.0 Standard Edition
- Microsoft Exchange Server 5.0 Standard Edition
- Microsoft Exchange Server 5.5 Standard Edition
This article was previously published under Q176170
SYMPTOMS
Using Performance Monitor in Microsoft Windows NT, an administrator can
monitor the Single Instance Ratio counter for the MSExchangeIS Private and
MSExchangeIS Public objects. This value may sometimes show a number between
0 and 1, which can give the impression of a problem with the information
store.
CAUSE
This value represents an approximation of the average instances of every
message in the store. Because Microsoft Exchange supports single instances
of messages that can be shared by multiple mailboxes, it is possible to
have more than one message shared by many users as long as the message
remains unaltered and resides in the server store.
However, this value may sometimes show a number less than 1 because of the
way the algorithm is designed to work and the way messages are internally
tracked by the store. A value of less than 1 should be interpreted as close
to 1.
Additional query words: perfmon
Keywords: kbinfo kbusage KB176170