# LDAP performance issues

For performance reasons, the LDAP directory server should be in the same LAN as Derby. Derby does not cache the user's credential information locally and thus must connect to the directory server every time a user connects.

Connection requests that provide the full DN are faster than those that must search for the full DN.

Parent topic: LDAP directory service
Related concepts
Setting up Derby to use your LDAP directory service
Guest access to search for DNs
Considerations when using Windows NT with LDAP
LDAP restrictions
Related reference
Libraries for LDAP user authentication