write behind problems

[Lucky]

Hi:
    As the updated data is more than 500000,so I set write behind parameters to 
true with java code .
    but it did not work .It's still wait until all data is persisted.
   When I debug the code ,I found my cache's cacheconfiguration is correctly 
set to true;
    the setting is:
    cacheCfg.setWriteBehindEnabled(true);
    cacheCfg.setWriteBehindFlushSize(10240);
    cacheCfg.setWriteBehindFlushFrequency(5000);
    cacheCfg.setWriteBehindBatchSize(10000);
    cacheCfg.setWriteBehindFlushThreadCount(3);


     I startup a Ignite node by default-config.xml.
     And use lifeCycleBean(after_node_start event) to load above configure and 
load all datas to cache.
     
    Any suggestion?


    Thanks.
    Lucky