System Thresholds
The following table lists the thresholds that you can configure for the Exchange Mailbox Server System, the default values, and the type of alert that is raised when the threshold is exceeded.
Table 15:Default Thresholds for Exchange Mailbox Server - System
| Threshold Name and Description | Type of Alert | Default Value |
|---|---|---|
|
ASPNet Request Wait Time Threshold Alerts are based on the amount of time that the request waited in the queue for processing. |
Warning |
0 ms |
|
Exchange Mailbox Disk Threshold An alert is raised when less than 10% of the disk is free space. |
Warning |
10 % |
|
Domain Controllers LDAP Read Time Threshold Alerts are based on the amount of time it takes to send a message to the domain controller and receive a response. |
Warning |
100 ms |
|
Processor Percentage Time Threshold Alerts are based on the percentage of time that the processor is executing instructions. |
Warning |
75 % |
|
Processes LDAP Search Time Threshold Alerts are based on the amount of time it takes to send an LDAP search request and receive a response. |
Warning |
100 ms |
|
Domain Controllers LDAP Search Time Alerts are based on the time (in ms) to send an LDAP search request to a domain controller and receive a response. |
Warning |
100 ms |
|
Processor Privileged Percentage Time Threshold Alerts are based on the amount of elapsed time that the service was running in privileged mode. |
Warning |
75 % |
|
.Net CLR Memory GC Percentage Time Threshold Alerts are based on the amount of time required to perform garbage collection. This process requires CPU and memory and can cause delays and disconnections if it exceeds the threshold. |
Warning |
10 % |
|
Processes LDAP Read Time Threshold Alerts are based on the amount of time required to send an LDAP request to a domain controller and receive a response. |
Warning |
100 ms |
|
ASPNet Application Restarts Threshold Notifications are based on the number of restarts of the ASP.NET application. |
Warning |
0 restarts |
|
Processor Queue Length Threshold Alerts are based on the number of threads the processor is servicing. A value higher than the threshold can cause high CPU usage and can indicate that processor capacity is not sufficient. |
Warning |
6 threads |
|
Memory Committed Bytes In Use Percentage Threshold Alerts are based on the amount of committed virtual memory in use, as a percentage of the memory/commit limit. |
Warning |
80 % |
|
Network Packets Outbound Errors Threshold Alerts are based on the number of outbound packets in error. |
Warning |
0 packets |
|
ASPNet Requests In Application Queue Threshold Alerts are based on the number of requests waiting for service in the application queue. |
Warning |
0 requests |
|
Processor User Percentage Time Threshold Alerts are based on the percentage of processor time spent in user mode, which is a processing mode for applications and subsystems. |
Warning |
75 % |
|
ASPNet Worker Process Restarts Threshold Alerts are based on the number of restarts of the ASP.NET worker process. |
Warning |
0 restarts |