InsufficientMemoryException in Appfabric

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AppFabric

Hi friends,
Following is the issues i am facing in appfabric. Waiting for help?

System.InsufficientMemoryException: Failed to allocate a managed memory buffer of 268435456 bytes. The amount of available memory may be low. ---> System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.
System Ram size- 32gb

After I set maxBufferSize="999999999", but still i am getting above error
please look into my configuration file

<configuration>
     <configsections>
       <section name="dataCache" type="Microsoft.ApplicationServer.Caching.DataCacheSection, Microsoft.ApplicationServer.Caching.Core" />
     </configsections>
     <datacache size="Small">
       <caches>
         <cache consistency="StrongConsistency" name="default" minsecondaries="0">
           <policy>
             <eviction type="Lru" />
             <expiration defaultttl="10" isexpirable="true" />
           </policy>
         </cache>
       </caches>
       <hosts>
         <host replicationport="22236" arbitrationport="22235" clusterport="22234">
           hostId="1222497344" size="16383" leadHost="true" account="XXX"
           cacheHostName="AppFabricCachingService" name="XXX.com"
           cachePort="22233" />
       </host></hosts>
    <advancedproperties>
         <securityproperties mode="None" protectionlevel="None">
           <authorization>
             <allow users="Anblicks" />
             <allow users="DefaultAppPool" />
             <allow users="Administrator" />
             ="network service" />
           </authorization>
         </securityproperties>
         <transportproperties><big>maxBufferSize="999999999"</big> />
       </transportproperties></advancedproperties>
       <deploymentsettings>
         <deploymentmode value="RoutingClient" />
       </deploymentsettings>
     </datacache>
   </configuration><pre>