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Refer : http://blogs.technet.com/b/markrussinovich/archive/2009/09/29/3283844.aspx
You an go through below link to identify which why svchost is using more handle count.
http://blogs.technet.com/b/yongrhee/archive/2011/12/19/how-to-troubleshoot-a-handle-leak.aspx
You can refer below EE artile also to identify if svchost is using more CPU /Memory
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/A_12862-SVCHOST-EXE-CONSUMING-HIGH-CPU-MEMORY.html