Hi, I want to use delta-syncrepl replication with 2 masters. But each slapd-process permanently needs about 25 % CPU usage without any traffic on it. The log looks endless like this: ** ld 01e43698 Outstanding Requests: * msgid 55, origid 55, status InProgress outstanding referrals 0, parent count 0 ld 01e43698 request count 1 (abandoned 18) ** ld 01e43698 Response Queue: Empty ld 01e43698 response count 0 ldap_chkResponseList ld 01e43698 msgid 55 all 0 ldap_chkResponseList returns ld 01e43698 NULL ldap_int_select read1msg: ld 01e43698 msgid 55 all 0 ber_get_next ber_get_next: tag 0x30 len 1187 contents: abandoned/discarded ld 01e43698 msgid 53 message type search-entry wait4msg continue ld 01e43698 msgid 55 all 0 ** ld 01e43698 Connections: * host: secondmaster.mydomain.local port: 389 (default) refcnt: 2 status: Connected last used: Mon Feb 13 11:26:53 2012 ** ld 01e43698 Outstanding Requests: * msgid 55, origid 55, status InProgress outstanding referrals 0, parent count 0 ld 01e43698 request count 1 (abandoned 18) ** ld 01e43698 Response Queue: Empty ld 01e43698 response count 0 ldap_chkResponseList ld 01e43698 msgid 55 all 0 ldap_chkResponseList returns ld 01e43698 NULL ldap_int_select read1msg: ld 01e43698 msgid 55 all 0 ber_get_next ber_get_next: tag 0x30 len 1187 contents: abandoned/discarded ld 01e43698 msgid 53 message type search-entry wait4msg continue ld 01e43698 msgid 55 all 0 ** ld 01e43698 Connections: * host: secondmaster.mydomain.local port: 389 (default) refcnt: 2 status: Connected last used: Mon Feb 13 11:26:53 2012 here is my configuration (completely the same for both masters): ----------------------------------------------------------------------------------------------------- ucdata-path ./ucdata include ./schema/core.schema include ./schema/cosine.schema include ./schema/Personcaesar.schema include ./schema/ConfigObjects.schema loglevel 0 logfile "C:/test/slapd.log" pidfile ./run/slapd.pid argsfile ./run/slapd.args access to * by dn.one="ou=Admins,o=caesar" write by anonymous auth ServerID 1 "ldap://firstmaster.mydomain.local" ServerID 2 "ldap://secondmaster.mydomain.local" ###################################################################### database config rootdn cn=config rootpw {SHA}secret ####################################################################### # BDB database definitions ####################################################################### # Accesslog database definitions database hdb suffix cn=accesslog checkpoint 1024 5 cachesize 10000 directory "C:/test/accessdata" dbconfig set_cachesize 0 30000000 1 dbconfig set_flags DB_LOG_AUTOREMOVE dbconfig set_lg_regionmax 1048576 dbconfig set_lg_max 10485760 dbconfig set_lg_bsize 2097152 rootdn cn=accesslog index objectClass,entryCSN,entryUUID eq # I even tried removing reqMod, reading your docs I am not sure if this is needed here index reqEnd,reqResult,reqMod,reqStart eq overlay syncprov syncprov-nopresent TRUE syncprov-reloadhint TRUE # Let the replica DN have limitless searches limits dn.exact="cn=Replicator,ou=admins,o=caesar" time.soft=unlimited time.hard=unlimited size.soft=unlimited size.hard=unlimited # Primary database definitions database hdb suffix "o=caesar" checkpoint 1024 5 cachesize 10000 idlcachesize 30000 rootdn "cn=Administrator,o=caesar" rootpw {SHA}secret directory "C:/test/data" dbconfig set_cachesize 0 100000000 1 dbconfig set_flags DB_LOG_AUTOREMOVE dbconfig set_lg_regionmax 1048576 dbconfig set_lg_max 10485760 dbconfig set_lg_bsize 2097152 # syncprov specific indexing index sn pres,eq index cn pres,eq,sub ... index entryUUID eq index entryCSN eq index objectClass eq # syncrepl Provider for primary db overlay syncprov syncprov-checkpoint 1000 60 syncprov-sessionlog 10000 # accesslog overlay definitions for primary db overlay accesslog logdb cn=accesslog logops writes logsuccess TRUE # scan the accesslog DB every day, and purge entries older than 7 days logpurge 07+00:00 01+00:00 sizelimit size.soft=100 size.hard=1000 size.prtotal=unlimited # Let the replica DN have limitless searches limits dn.exact="cn=Replicator,ou=admins,o=caesar" time.soft=unlimited time.hard=unlimited size.soft=unlimited size.hard=unlimited syncrepl rid=001 provider="ldap://firstmaster.mydomain.local" searchbase="o=caesar" type=refreshAndPersist retry="5 3 15 +" binddn="cn=Replicator,ou=admins,o=caesar" bindmethod=simple credentials="secret" logbase="cn=accesslog" logfilter="(&(objectClass=auditWriteObject)(reqResult=0))" schemachecking=on syncdata=accesslog syncrepl rid=002 provider="ldap://secondmaster.mydomain.local" searchbase="o=caesar" type=refreshAndPersist retry="5 3 15 +" binddn="cn=Replicator,ou=admins,o=caesar" bindmethod=simple credentials="secret" logbase="cn=accesslog" logfilter="(&(objectClass=auditWriteObject)(reqResult=0))" schemachecking=on syncdata=accesslog MirrorMode On ----------------------------------------------------------------------------------------------------- I did my test on 2 Windows PCs and OpenLDAP 2.4.29 with Berkeley 5.1 . Thanks for any hints, FO