the configuration below is a quick conversion. I've removed parts of the jgroups configuration which are implicit.
As for disappointing performance, could you tell us what you want achieve (read/write ratio, target performance, etc) ?
{code:xml}
<?xml version='1.0' encoding='UTF-8'?>
<server xmlns="urn:jboss:domain:1.4">
<extensions>
<extension module="org.infinispan.server.endpoint"/>
<extension module="org.jboss.as.clustering.infinispan"/>
<extension module="org.jboss.as.clustering.jgroups"/>
<extension module="org.jboss.as.connector"/>
<extension module="org.jboss.as.jdr"/>
<extension module="org.jboss.as.jmx"/>
<extension module="org.jboss.as.logging"/>
<extension module="org.jboss.as.naming"/>
<extension module="org.jboss.as.remoting"/>
<extension module="org.jboss.as.security"/>
<extension module="org.jboss.as.threads"/>
<extension module="org.jboss.as.transactions"/>
<extension module="org.jboss.as.web"/>
</extensions>
<management>
<security-realms>
<security-realm name="ManagementRealm">
<authentication>
<local default-user="$local"/>
<properties path="mgmt-users.properties" relative-to="jboss.server.config.dir"/>
</authentication>
</security-realm>
<security-realm name="ApplicationRealm">
<authentication>
<local default-user="$local" allowed-users="*"/>
<properties path="application-users.properties" relative-to="jboss.server.config.dir"/>
</authentication>
</security-realm>
</security-realms>
<management-interfaces>
<native-interface security-realm="ManagementRealm">
<socket-binding native="management-native"/>
</native-interface>
<http-interface security-realm="ManagementRealm">
<socket-binding http="management-http"/>
</http-interface>
</management-interfaces>
</management>
<profile>
<subsystem xmlns="urn:jboss:domain:logging:1.2">
<console-handler name="CONSOLE">
<level name="INFO"/>
<formatter>
<pattern-formatter pattern="%K{level}%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%E%n"/>
</formatter>
</console-handler>
<periodic-rotating-file-handler name="FILE" autoflush="true">
<formatter>
<pattern-formatter pattern="%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%E%n"/>
</formatter>
<file relative-to="jboss.server.log.dir" path="server.log"/>
<suffix value=".yyyy-MM-dd"/>
<append value="true"/>
</periodic-rotating-file-handler>
<logger category="com.arjuna">
<level name="WARN"/>
</logger>
<logger category="org.apache.tomcat.util.modeler">
<level name="WARN"/>
</logger>
<logger category="org.jboss.as.config">
<level name="DEBUG"/>
</logger>
<logger category="sun.rmi">
<level name="WARN"/>
</logger>
<logger category="jacorb">
<level name="WARN"/>
</logger>
<logger category="jacorb.config">
<level name="ERROR"/>
</logger>
<root-logger>
<level name="INFO"/>
<handlers>
<handler name="CONSOLE"/>
<handler name="FILE"/>
</handlers>
</root-logger>
</subsystem>
<subsystem xmlns="urn:infinispan:server:endpoint:5.3">
<memcached-connector socket-binding="memcached" cache-container="clustered"/>
</subsystem>
<subsystem xmlns="urn:jboss:domain:datasources:1.1">
<datasources/>
</subsystem>
<subsystem xmlns="urn:infinispan:server:core:5.3" default-cache-container="clustered">
<cache-container name="clustered" default-cache="default">
<transport executor="infinispan-transport" lock-timeout="60000"/>
<distributed-cache name="default" mode="SYNC" segments="20" owners="2" remote-timeout="30000" start="EAGER">
<locking isolation="READ_COMMITTED" acquire-timeout="30000" concurrency-level="1000" striping="false"/>
<transaction mode="NONE"/>
</distributed-cache>
<distributed-cache name="memcachedCache" mode="SYNC" segments="20" owners="2" remote-timeout="30000" start="EAGER">
<locking isolation="READ_COMMITTED" acquire-timeout="30000" concurrency-level="1000" striping="false"/>
<transaction mode="NONE"/>
</distributed-cache>
</cache-container>
<cache-container name="security"/>
</subsystem>
<subsystem xmlns="urn:jboss:domain:jca:1.1">
<archive-validation enabled="true" fail-on-error="true" fail-on-warn="false"/>
<bean-validation enabled="true"/>
<default-workmanager>
<short-running-threads>
<core-threads count="50"/>
<queue-length count="50"/>
<max-threads count="50"/>
<keepalive-time time="10" unit="seconds"/>
</short-running-threads>
<long-running-threads>
<core-threads count="50"/>
<queue-length count="50"/>
<max-threads count="50"/>
<keepalive-time time="10" unit="seconds"/>
</long-running-threads>
</default-workmanager>
<cached-connection-manager/>
</subsystem>
<subsystem xmlns="urn:jboss:domain:jdr:1.0"/>
<subsystem xmlns="urn:jboss:domain:jgroups:1.2" default-stack="${jboss.default.jgroups.stack:tcp}">
<stack name="udp">
<transport type="UDP" socket-binding="jgroups-udp"/>
<protocol type="PING"/>
<protocol type="MERGE2"/>
<protocol type="FD_SOCK" socket-binding="jgroups-udp-fd"/>
<protocol type="FD_ALL"/>
<protocol type="pbcast.NAKACK"/>
<protocol type="UNICAST2"/>
<protocol type="pbcast.STABLE"/>
<protocol type="pbcast.GMS"/>
<protocol type="UFC"/>
<protocol type="MFC"/>
<protocol type="FRAG2"/>
<protocol type="RSVP"/>
</stack>
<stack name="tcp">
<transport type="TCP" socket-binding="jgroups-tcp"/>
<protocol type="TCPPING">
<property name="timeout">3000</property>
<property name="initial_hosts">10.190.149.173[7800],10.72.50.110[7800]</property>
<property name="port_range">1</property>
<property name="num_initial_members">1</property>
</protocol>
<protocol type="MERGE2">
<property name="max_interval">30000</property>
<property name="min_interval">10000</property>
</protocol>
<protocol type="FD_SOCK" socket-binding="jgroups-tcp-fd"/>
<protocol type="FD"/>
<protocol type="VERIFY_SUSPECT"/>
<protocol type="pbcast.NAKACK">
<property name="use_mcast_xmit">false</property>
</protocol>
<protocol type="UNICAST2"/>
<protocol type="pbcast.STABLE">
<property name="stability_delay">1000</property>
<property name="desired_avg_gossip">50000</property>
<property name="max_bytes">400000</property>
</protocol>
<protocol type="pbcast.GMS">
<property name="print_local_addr">true</property>
<property name="join_timeout">3000</property>
<property name="view_bundling">true</property>
</protocol>
<protocol type="UFC">
<property name="max_credits">2M</property>
<property name="min_threshold">0.4</property>
</protocol>
<protocol type="MFC">
<property name="max_credits">2M</property>
<property name="min_threshold">0.4</property>
</protocol>
<protocol type="FRAG2">
<property name="frag_size">60K</property>
</protocol>
<protocol type="RSVP"/>
</stack>
</subsystem>
<subsystem xmlns="urn:jboss:domain:jmx:1.1">
<show-model value="true"/>
<remoting-connector/>
</subsystem>
<subsystem xmlns="urn:jboss:domain:naming:1.2"/>
<subsystem xmlns="urn:jboss:domain:remoting:1.1">
<connector name="remoting-connector" socket-binding="remoting" security-realm="ApplicationRealm"/>
</subsystem>
<subsystem xmlns="urn:jboss:domain:security:1.2">
<security-domains>
<security-domain name="other" cache-type="infinispan">
<authentication>
<login-module code="Remoting" flag="optional">
<module-option name="password-stacking" value="useFirstPass"/>
</login-module>
<login-module code="RealmUsersRoles" flag="required">
<module-option name="usersProperties" value="${jboss.server.config.dir}/application-users.properties"/>
<module-option name="rolesProperties" value="${jboss.server.config.dir}/application-roles.properties"/>
<module-option name="realm" value="ApplicationRealm"/>
<module-option name="password-stacking" value="useFirstPass"/>
</login-module>
</authentication>
</security-domain>
<security-domain name="jboss-web-policy" cache-type="infinispan">
<authorization>
<policy-module code="Delegating" flag="required"/>
</authorization>
</security-domain>
</security-domains>
</subsystem>
<subsystem xmlns="urn:jboss:domain:threads:1.1">
<thread-factory name="infinispan-factory" group-name="infinispan" priority="5"/>
<unbounded-queue-thread-pool name="infinispan-transport">
<max-threads count="25"/>
<keepalive-time time="0" unit="milliseconds"/>
<thread-factory name="infinispan-factory"/>
</unbounded-queue-thread-pool>
</subsystem>
<subsystem xmlns="urn:jboss:domain:transactions:1.2">
<core-environment>
<process-id>
<uuid/>
</process-id>
</core-environment>
<recovery-environment socket-binding="txn-recovery-environment" status-socket-binding="txn-status-manager"/>
<coordinator-environment default-timeout="300"/>
</subsystem>
<subsystem xmlns="urn:jboss:domain:web:1.1" default-virtual-server="default-host" native="false">
<connector name="http" protocol="HTTP/1.1" scheme="http" socket-binding="http"/>
<connector name="ajp" protocol="AJP/1.3" scheme="http" socket-binding="ajp"/>
<virtual-server name="default-host" enable-welcome-root="false">
<alias name="localhost"/>
<alias name="example.com"/>
</virtual-server>
</subsystem>
</profile>
<interfaces>
<interface name="management">
<inet-address value="${jboss.bind.address.management:127.0.0.1}"/>
</interface>
<interface name="public">
<inet-address value="${jboss.bind.address:127.0.0.1}"/>
</interface>
</interfaces>
<socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}">
<socket-binding name="management-native" interface="management" port="${jboss.management.native.port:9999}"/>
<socket-binding name="management-http" interface="management" port="${jboss.management.http.port:9990}"/>
<socket-binding name="management-https" interface="management" port="${jboss.management.https.port:9443}"/>
<socket-binding name="ajp" port="8009"/>
<socket-binding name="http" port="8080"/>
<socket-binding name="https" port="8443"/>
<socket-binding name="jgroups-mping" port="0" multicast-address="${jboss.default.multicast.address:234.99.54.14}" multicast-port="45700"/>
<socket-binding name="jgroups-tcp" port="7080"/>
<socket-binding name="jgroups-tcp-fd" port="57600"/>
<socket-binding name="jgroups-udp" port="55200" multicast-address="${jboss.default.multicast.address:234.99.54.14}" multicast-port="45688"/>
<socket-binding name="jgroups-udp-fd" port="54200"/>
<socket-binding name="memcached" port="11211"/>
<socket-binding name="remoting" port="4447"/>
<socket-binding name="txn-recovery-environment" port="4712"/>
<socket-binding name="txn-status-manager" port="4713"/>
</socket-binding-group>
</server>
{code}
