I’m trying to set nsslapd-listen-backlog-size which is documented to change the listen queue backlog. I have net.core.somaxconn = 8192 and I am trying to set listen-backlog to 4096. dn: cn=config cn: config objectClass: top objectClass: extensibleObject objectClass: nsslapdConfig nsslapd-listen-backlog-size: 4096 … I get the following: [02/Sep/2014:18:49:33 -0400] config - Unknown attribute nsslapd-listen-backlog-size will be ignored [02/Sep/2014:18:49:33 -0400] - 389-Directory/1.2.11.30 B2014.219.205 starting up [02/Sep/2014:18:49:33 -0400] - slapd started. Listening on All Interfaces port 389 for LDAP requests [02/Sep/2014:18:49:33 -0400] - Listening on All Interfaces port 636 for LDAPS requests Why am I getting the Unknown attribute error? (i feel like i am doing something really stupid here). /mrg -- 389 users mailing list 389-users@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/389-users