connection rate in ejabberd.

may be i ask wrong formed question.
this is what i have:
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ejabberd soft memlock unlimited
ejabberd hard memlock unlimited
ejabberd soft stack unlimited
ejabberd hard stack unlimited
ejabberd soft nofile 65535
ejabberd hard nofile 65535
ejabberd soft nproc unlimited
ejabberd hard nproc unlimited

ERL_MAX_FILES=65535
ERL_PROCESSES=2500000

Erlang R15B02 (erts-5.9.2) [source] [64-bit] [smp:4:4] [async-threads:0] [kernel-poll:true]

ejabberd 2.1.11-5 rhel6 x64

config:
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override_global.
override_local.
override_acls.
{loglevel, 4}.
{hosts, ["localhost","domain.com"]}.
{listen,
[
{5222, ejabberd_c2s, [
{certfile, "/etc/ejabberd/ejabberd.pem"}, starttls,
{access, c2s}
]},
{5223, ejabberd_c2s, [
{access, c2s},
{certfile, "/etc/ejabberd/ejabberd.pem"}, tls
]},
{5269, ejabberd_s2s_in, [
]},
{5280, ejabberd_http, [
{request_handlers,
[
{["web"], mod_http_fileserver},
{["archive"], mod_archive_webview}
]},
captcha,
http_bind,
http_poll,
web_admin
]}
]}.
{host_config, "domain.com", [
{auth_method, [ldap]},
{ldap_port, 389},
{ldap_servers,["1.1.1.1"]},
{ldap_rootdn,"uid=dmaster,o=domain"},
{ldap_password, "lala"},
{ldap_base, "o=domain"},
{ldap_filter,"(&(objectClass=CommuniGateAccount)(uid=*)(JabberGroup=Mez*))"},
{ldap_uids, [{"uid"}]}
]}.
{host_config, "localhost", [
{auth_method, internal}
]}.
{shaper, normal, {maxrate, 1000000}}.
{shaper, fast, {maxrate, 3000000}}.
{max_fsm_queue, 10000000}.
{acl, admin, {user, "admin", "localhost"}}.
{acl, local, {user_regexp, ""}}.
{access, max_user_sessions, [{20000000, all}]}.
{access, max_user_offline_messages, [{5000, admin}, {1000, all}]}.
{access, local, [{allow, local}]}.
{access, c2s,[{allow, all}]}.
{access, c2s_shaper, [{none, admin},
{none, all}]}.
{access, s2s_shaper, [{none, all}]}.
{access, announce, [{allow, admin}]}.
{access, configure, [{allow, admin}]}.
{access, muc_admin, [{allow, admin}]}.
{access, muc_create, [{allow, local}]}.
{access, muc, [{allow, all}]}.
{access, pubsub_createnode, [{allow, local}]}.
{access, register, [{allow, all}]}.
{registration_timeout, infinity}.
{language, "en"}.
{modules,
[
{mod_adhoc, []},
{mod_announce, [{access, announce}]}, % recommends mod_adhoc
{mod_caps, []},
{mod_configure,[]}, % requires mod_adhoc
{mod_disco, []},
{mod_archive, [{save_default, true}]},
{mod_irc, []},
{mod_http_bind, []},
{mod_last, []},
{mod_muc, [
{access, muc},
{access_create, muc_create},
{access_persistent, muc_create},
{access_admin, muc_admin}
]},
{mod_offline, []},
{mod_ping, []},
{mod_privacy, []},
{mod_private, []},
{mod_pubsub, [
{access_createnode, pubsub_createnode},
{ignore_pep_from_offline, true}, % reduces resource comsumption, but XEP incompliant
{last_item_cache, false},
{plugins, ["flat", "hometree", "pep"]} % pep requires mod_caps
]},
{mod_register, [
{welcome_message, {"Welcome!",
"Hi.\nWelcome to this XMPP server."}},
{access, register}
]},
{mod_roster, [
{managers, ["icq.domain.com", "icq2.domain.com", "icq3.domain.com"]}
]},
{mod_service_log,[]},
{mod_stats, []},
{mod_time, []},
{mod_vcard_ldap, [
{search, true},
{matches, infinity},
{ldap_vcard_map,
[{"NICKNAME", "%u", ["nickname"]},
{"GIVEN", "%s", ["givenname"]},
{"MIDDLE", "%s", ["initials"]},
{"FAMILY", "%s", ["sn"]},
{"FN", "%s %s %s", ["sn", "givenName", "initials"]},
{"TITLE", "%s", ["title"]},
{"ORGUNIT", "%s", ["ou"]},
{"TEL", "work: %s\ncell: %s\nip: %s", ["telephoneNumber", "mobile", "AccountIP"]},
{"ORGNAME", "%s", ["o"]},
{"EMAIL", "%s", ["mail"]},
{"DESC", "ip:%s", ["AccountIP"]},
{"REGION", "%s", ["st"]},
{"CITY", "%s", ["l"]}
]},
{ldap_search_fields,
[{"User", "uid"},
{"Name", "givenName"},
{"Last Name", "sn"},
{"Department", "ou"},
{"Title", "title"},
{"Phone", "telephoneNumber"},
{"Email", "mail"}
]},
{ldap_search_reported,
[{"Full Name", "fn"},
{"Phone", "tel"},
{"Nickname", "nickname"}
]}
]},
{mod_version, []},
{mod_shared_roster_ldap,[
{ldap_user_cache_validity,7200},
{ldap_group_cache_validity,7200},
{iqdisc, {queues, 6000}},
{ldap_auth_check,off},
{ldap_servers,["1.1.1.1"]},
{ldap_port,389},
{ldap_rootdn,"uid=dmaster,o=domain"},
{ldap_base,"o=domain"},
{ldap_groupattr,"JABBERGROUP"},
{ldap_password,"lala"},
{ldap_memberattr,"uid"},
{ldap_rfilter,"(objectclass=CommuniGateAccount)"},
{ldap_filter,"(&(objectClass=CommuniGateAccount)(uid=*)(JabberGroup=Mez*))"},
{ldap_useruid, "uid"},
{ldap_userdesc,"cn"}
]}
]}.
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