Dec 30 12:42:47 wilma slapd[1788]: bdb_db_open: DB_CONFIG for suffix dc=vtk,dc=be has changed. Performing database recovery to activate new settings. 
Dec 30 12:42:47 wilma slapd[1788]: bdb(dc=vtk,dc=be): unrecognized name-value pair: txn_checkpoint 
Dec 30 12:42:47 wilma slapd[1788]: bdb_db_open: Database cannot be recovered, err 22. Restore from backup! 
Dec 30 12:42:47 wilma slapd[1788]: bdb(dc=vtk,dc=be): DB_ENV->lock_id_free interface requires an environment configured for the locking subsystem 
Dec 30 12:42:47 wilma slapd[1788]: bdb(dc=vtk,dc=be): txn_checkpoint interface requires an environment configured for the transaction subsystem 
Dec 30 12:42:47 wilma slapd[1788]: bdb_db_close: txn_checkpoint failed: Invalid argument (22) 
Dec 30 12:42:47 wilma slapd[1788]: backend_startup_one: bi_db_open failed! (22) 
Dec 30 12:42:47 wilma slapd[1788]: bdb_db_close: alock_close failed 
Dec 30 12:42:47 wilma slapd[1788]: slapd stopped. 
Dec 30 12:42:47 wilma slapd[1788]: connections_destroy: nothing to destroy. 

DB_CONFIG:
set_cachesize 0 2097152 0
set_lk_max_objects 1500
set_lk_max_locks 1500
set_lk_max_lockers 1500

set_lk_detect DB_LOCK_DEFAULT
set_flags DB_TXN_NOSYNC
set_flags DB_LOG_AUTOREMOVE
set_lg_max 5242880
set_cachesize 0 5242880 1