Hi, The change I made to DB_CONFIG does not take effect. Berkeley DB still uses default 256K for cache size. Here is set_cachesize line: set_cachesize 0 268435456 1 The DB version is 4.5.20 with patches. After changing DB_CONFIG, I rebuilt the database with: db_recover -h /var/lib/ldap The total cache size remains 256K, instead of 256M. What did I miss? Simon