LDAP caches

You can populate and tune LDAP caches to reduce disk I/O operations and to improve directory server performance.

LDAP caches are fast storage buffers in memory and stores LDAP information such as queries, results, and user authentication for future use. Tuning the LDAP caches is crucial for improving performance.

An LDAP search command that accesses an LDAP cache can be faster than the one that requires a connection to DB2®. The data retrieval from an LDAP cache is eve faster that retrieving the information that is cached in DB2. For this reason, tuning LDAP caches can improve performance by avoiding calls to the database. The LDAP caches are especially useful for applications that frequently retrieve repeated cached information.

You must determine how to use LDAP caches, such as filter cache, ACL cache, and entry cache, and the optimum cache settings for your system. Cache sizes for the filter cache, ACL cache, and entry cache are measured in numbers of entries. Keep in mind that every workload is different, and some experimentation is required to find the best settings for your workload.