DC DIT log file disk space
Indicates that the amount of disk space available on the volume Active Directory® uses for its log files is less than or equal to the configured threshold.
Data collector
• Category: General
• Name: Active Directory database log details
• Supported on: Windows Server 2016, Windows Server 2019, and Windows Server 2022
• Required permissions: When monitored locally and remotely, only domain user privilege is required. When monitored remotely, the target server must have WMI remote access enabled and the user must be a member of the Distributed COM Users group.Description
A low disk space condition can be due to many different things, such as:
Resolution
First, check the registry on the server to determine the disk volume that contains the Active Directory log files. Under the HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\NTDS\Parameters registry key, the value Database log files path contains the path of the file in which Active Directory keeps its log files.
DC LDAP load
Data collector
• Category: Performance Counters
• Name: NTDS LDAP writes a second
• Supported on: Windows Server 2016, Windows Server 2019, and Windows Server 2022
• Required permissions: When monitored locally and remotely, only domain user privilege is required and the user must be a part of the Performance Logs user group.Description
The Directory Analyzer agent monitors the NTDS LDAP writes a second performance counter on the domain controller. If the value goes above the configured threshold for a period exceeding the configured duration, the agent sets this alert condition.
Active Directory® clients use LDAP to communicate with the Directory Service Agent (DSA). A high LDAP load indicates that a lot of clients are making many requests of the DSA. Increased LDAP load can reduce the throughput of the DSA, and can cause important directory transactions, such as login and authentication, to fail.
Resolution
DC LDAP response too slow
Data Collector
• Category: General
• Name: LDAP response time
• Supported on: Windows Server 2016, Windows Server 2019, and Windows Server 2022
• Required permissions: When monitored locally and remotely, only domain user privilege is required.Description
Active Directory® clients use LDAP to communicate with the Directory Service Agent (DSA). A high response time value indicates that the domain controller is not satisfying directory requests quickly, which can result in poor client response times and, if bad enough, login and authentication failures.
Resolution
DC Memory Usage
Data collector
• Category: Performance Counters
• Name: Memory Usage
• Supported on: Windows Server 2016, Windows Server 2019, and Windows Server 2022
• Required permissions: When monitored locally and remotely, only domain user privilege is required and the user must be a part of the Performance Logs user group.Description
It is also possible that memory use has increased due to some pathological condition in a particular application. For instance, Active Directory® itself requires substantial resources when it is processing inherited Access Control Lists (ACLs). Active Directory can also require a lot of resources when it processes complex, non-indexed directory searches.
Resolution
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