db2j.rawStoreDaemon threads running in WAS and consuming CPU

I am profiling my J2EE application running in WAS and i have found two threads db2j.rawStoreDaemon threads running and consuming CPU time.
What are these threads and can I eliminate them?
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Weiping DuConnect With a Mentor Senior Web DeveloperCommented:
Does your application has Timer and it running TimerTask?  The timer will start to run in seperated Thread.  
If you don't want them to run while application start,  remove its <load-on-startup> tag from web.xml
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