ADAM LDAP Performance Test

The Lightweight Directory Access Protocol (LDAP) is a directory service protocol that runs on a layer above the TCP/IP stack. It provides a mechanism used to connect to, search, and modify Internet directories. The LDAP directory service is based on a client-server model. The function of LDAP is to enable access to an existing directory. LDAP is one of the protocols used to query and modify items on the Active Directory server.

To monitor the interactions between clients and the AD server over LDAP, and to promptly capture slowdowns in LDAP searches and binds, use the ADAM LDAP Performance test.

Note:

This test applies only to Active Directory Servers installed on Windows 2008.

Target of the test : An Active Directory or Domain Controller on Windows 2008

Agent deploying the test : An internal agent

Outputs of the test : One set of results for every Active Directory site that is being monitored

Configurable parameters for the test
Parameters Description

Test period

This indicates how often should the test be executed.

Host

The IP address of the machine where the Active Directory is installed.

Port

The port number through which the Active Directory communicates. The default port number is 389.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Ldap searches

Indicates the rate at which LDAP clients perform search operations.

Searches/Sec

This counter should show activity over time. If it does not, network problems are probably hindering the processing of client requests.

Ldap writes

Indicates the rate at which clients perform write operations on the AD server.

Writes/Sec

 

Ldap active threads

Indicates the current number of threads in use by the LDAP subsystem of the local directory service.

Number

A high number indicates a high level of LDAP activity on the directory service.

Ldap bind time

Indicates the time, in milliseconds, taken for the last successful LDAP bind.

Secs

In Active Directory Domain Services, the act of associating a programmatic object with a specific Active Directory Domain Services object is known as binding. When a programmatic object, such as an IADs or DirectoryEntry object, is associated with a specific directory object, the programmatic object is considered to be bound to the directory object.

This measure should be as low as possible. If it is not, hardware or network-related problems are indicated.

Ldap sessions

Indicates the number of currently connected LDAP client sessions.

Number

This measure is just an indicator of the number of Ldap clients connected to the Active Directory. A high or low value for this measure does not always denote an error situation.

Ldap closed connections

Indicates the LDAP connections that have been closed in the last second.

Connections/Sec

 

Ldap new connections

Indicates the number of new LDAP connections that have arrived in the last second.

Connections/Sec

 

Ldap new ssl connections

Indicates the  number of new SSL or TLS connections that arrived in the last second.

Connections/Sec

 

Ldap successful binds

Indicates the number of successful LDAP binds per second.

Binds/Sec

In Active Directory Domain Services, the act of associating a programmatic object with a specific Active Directory Domain Services object is known as binding. When a programmatic object, such as an IADs or DirectoryEntry object, is associated with a specific directory object, the programmatic object is considered to be bound to the directory object.

A high value is desired for this measure. A very low value could indicate network problems.