eG Monitoring
 

Measures reported by X2007MailboxStrTest

The Exchange store is responsible for data storage and management. It is the interface between the clients and the server running Exchange Server. There are three components of the Exchange Store, namely:

  • Storage Groups
  • Mailboxes
  • Public Folders

This test reports statistics pertaining to the Mailbox component of the Exchange store.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Active_Client_Logons The number of clients that performed any active in the last ten minute interval. Number  
Average_Delivery_Time This measure indicates the average time between the submission of a message to the mailbox store and the delivery to all local recipients (recipients on the same server) for the last 10 messages. Secs A non-zero value for this measure indicates a change in user workload.

An abnormally high value for this measure indicates inability to deliver to one or more destinations. One of the possible reasons for this can be a network failure.
Categorization_Count Indicates the number of categorizations that currently exist in the mailbox store. Number Categorizations are created when a user creates a filtered view or performs a search. When the information store must maintain an excessive number of categorizations, performance can be affected.
Client_Logons The number of clients currently logged on. Number This measure is a good indicator of the current user activity in the Exchange Server. This information can be used by the administrator for planning the capacity of the mail server.
Local_Delivery_Rate Indicates the rate at which mails are delivered locally. Mails/Sec  
Msg_Queued_for_Subm The current number of submitted messages which are not yet processed by transport. Number  
Msg_Delivered_per_sec Indicates the rate at which messages are delivered to all recipients. Mails/Sec  
Msg_Open_per_sec This measure indicates the rate at which the requests to open the messages are being submitted to the information store. Msgs/Sec This measure shows the overall picture of user activity. An abnormally high value for this measure may indicate that the Exchange 2000 Server is overloaded.
Msg_Sent_per_sec This measure indicates the rate at which messages are sent to transport by the information store. Msgs/Sec  
Msg_Submitted_per_sec Indicates the rate at which mails are submitted by clients. Msgs/Sec  
Receive_Queue_Size This measure shows the number of messages that are currently in the receiving queue of the information store. Number This measure is usually zero under normal conditions.

A non-zero value for this measure indicates that the SMTP service is choking up memory.

Search_Task_Rate Indicates the number of search tasks created per second. Tasks/Sec  
Slow_FindRow_Rate Indicates the rate at which the slower FindRow needs to be used in the mailbox store. Finds/Sec Higher values indicate applications are crawling or searching mailboxes, which is affecting server performance. These include desktop search engines, customer relationship management (CRM), or other third-party applications.
Rpc_Averaged_latency Indicates the average time taken for processing the last 1024 packets in this exchange server. MSec Ideally, the value of this measure should be less than 25 milliseconds. The latency represents how long it takes from the time the Store.exe process received the packet to the time it returned the packet. An increase in latency may be caused by the following:

  • An increase in RPC load
  • A bottleneck in one or more server resources
Furthermore, a bottleneck may be caused by the following:
  • High RPC load (or any other load on the server)
  • Hardware malfunction or configuration error