用Tsung对XMPP进行压力测试，登陆用户只有十几个，无法再添加，何故？
下面是配置文件jobber.xml
<?xml version="1.0"?>
<!DOCTYPE tsung SYSTEM "/usr/local/tsung/share/tsung/tsung-1.0.dtd">
<tsung loglevel="notice" version="1.0">
<clients>
<client host="localhost" use_controller_vm="true" maxusers="60000"></client>
</clients>
<!-- Server side setup -->
<servers>
<server host="192.168.1.188" port="5222" type="tcp"></server>
</servers>
<load>
<arrivalphase phase="1" duration="1" unit="minute">
<users interarrival="2" unit="second"></users>
<users arrivalrate="300" unit="second"></users>
</arrivalphase>
</load>
<!-- JABBER parameters -->
<!-- to synchronise users, use a global acknoledgement -->
<options>
<option type="ts_jabber" name="global_number" value="100"></option>
<option type="ts_jabber" name="userid_max" value="10000"></option>
<option type="ts_jabber" name="domain" value="192.168.1.188"></option>
<option type="ts_jabber" name="username" value="tsung"></option>
<option type="ts_jabber" name="passwd" value="tsung"></option>
</options>
<sessions>
<session probability="50" name="jabber-example" type="ts_jabber">
<request> <jabber type="connect" ack="no_ack"></jabber> </request>
<thinktime value="2"></thinktime>
<transaction name="authenticate">
<request> <jabber type="auth_get" ack="local"></jabber> </request>
<request> <jabber type="auth_set_plain" ack="local"></jabber> </request>
</transaction>
<request> <jabber type="presence:initial" ack="no_ack"/> </request>
<thinktime value="2"></thinktime>
<transaction name="roster">
<request> <jabber type="iq:roster:get" ack="local"></jabber></request>
</transaction>
<thinktime value="30"></thinktime>
<transaction name="online">
<request> <jabber type="chat" ack="no_ack" size="16" destination="online"></jabber> </request>
</transaction>
<thinktime value="30"></thinktime>
<transaction name="offline">
<request> <jabber type="chat" ack="no_ack" size="56" destination="offline"></jabber> </request>
</transaction>
<thinktime value="30"></thinktime>
<transaction name="close">
<request> <jabber type="close" ack="no_ack"></jabber> </request>
</transaction>
</session>
<session probability="20" name="jabber-plain" type="ts_jabber">
<request> <jabber type="connect" ack="no_ack"></jabber> </request>
<thinktime value="2"></thinktime>
<transaction name="auth_plain">
<request> <jabber type="auth_get" ack="local"></jabber> </request>
<request> <jabber type="auth_set_plain" ack="local"></jabber> </request>
</transaction>
<thinktime value="30"></thinktime>
<transaction name="close">
<request> <jabber type="close" ack="no_ack"></jabber> </request>
</transaction>
</session>
<session probability="20" name="jabber-digest" type="ts_jabber">
<!-- regexp captures stream ID returned by server -->
<request>
<dyn_variable name="sid" re="<stream:stream id="(.*)" xmlns:stream"/>
<jabber type="connect" ack="local"></jabber>
</request>
<thinktime value="2"></thinktime>
<transaction name="auth_digest">
<request> <jabber type="auth_get" ack="local"></jabber> </request>
<request subst='true'> <jabber type="auth_set_digest" ack="local"></jabber> </request>
</transaction>
<thinktime value="30"></thinktime>
<transaction name="close">
<request> <jabber type="close" ack="no_ack"></jabber> </request>
</transaction>
</session>
<session probability="10" name="jabber-sipdigest" type="ts_jabber">
<request> <jabber type="connect" ack="no_ack"></jabber> </request>
<thinktime value="2"></thinktime>
<transaction name="auth_sipdigest">
<!-- regexp captures nonce value returned by server -->
<request>
<dyn_variable name="nonce" re="<Nonce encoding="hex">(.*)<\/Nonce>"/>
<jabber type="auth_get" ack="local"></jabber>
</request>
<request subst='true'> <jabber type="auth_set_sip" ack="local"></jabber> </request>
</transaction>
<thinktime value="30"></thinktime>
<transaction name="close">
<request> <jabber type="close" ack="no_ack"></jabber> </request>
</transaction>
</session>
</sessions>
</tsung>