eG Help

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 LDAP Performance test.

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

Measurement	Description	Measurement Unit	Interpretation
Ldap_search	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_write	Indicates the rate at which clients perform write operations on the AD server.	Writes/Sec
Ldap_acti_thread	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_tim	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_cli_sess	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_close_conn	Indicates the LDAP connections that have been closed in the last second.	Connections/Sec
Ldap_new_conn	Indicates the number of new LDAP connections that have arrived in the last second.	Connections/Sec
Ldap_new_ssl_conn	Indicates the number of new SSL or TLS connections that arrived in the last second.	Connections/Sec
Ldap_succ_bind	Indicates the 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.