On the Counters tab, you can monitor the server resource usage using remote procedure call (RPC) performance counters.
| 
 Counter  | 
 Description  | 
|---|---|
| 
 Start time  | 
 The time that the ContentStore Mail ServerContentStore Mail Server (SMTP) was started.  | 
| 
 Session count  | 
 The number of SMTP connections per session that are connected to the server.  | 
| 
 Available space on drive  | 
 The amount of space that is available on the drive where the messages are stored.  | 
| 
 Rejected SMTP sessions  | 
 Connections from SMTP servers that were not accepted by the ContentStore Mail ServerContentStore Mail Server. If an IP address is a legitimate SMTP address in your environment, you might need to add it in the Accept connection from area of the Settings tab.  | 
| 
 Message Size (MB) per hour  | 
 The amount of traffic on the SMTP server measured by the total size of messages received on the server within the last hour.  | 
| 
 Messages per hour  | 
 The amount of traffic on the SMTP server measured by the total number of messages received on the server within the last 24 hours.  | 
| 
 Message Size (MB) per day  | 
 The amount of traffic on the SMTP server measured by the total size of messages received on the server within the last hour.  | 
| 
 Messages per day  | 
 The amount of traffic on the SMTP server measured by the total number of messages received on the server within the 24 hours.  | 
| 
 % Processor Time  | 
 The average processor usage over all processors.  | 
| 
 # Bytes in all Heaps  | 
 The memory that is currently allocated on the garbage heaps. This value is in megabytes.  | 
If you need to create a report to help troubleshoot usage issues, you can click Capture for each counter to create a snapshot of the individual counter. Alternatively, you can click Capture All in the upper right corner of the counter display to take a snapshot of all counters at once. You can then save the image to your local computer based on the save procedure for your browser.