improve for issue #135:limit max scan count 10000
improve for issue #135:limit max scan count 10000

tempbottle/ardb,spitfire2/ardb,yinqiwen/ardb,wfxiang08/ardb,bssrdf/ardb,lsm/ardb,wfxiang08/ardb,tempbottle/ardb,yinqiwen/ardb,spitfire2/ardb,lsm/ardb,bssrdf/ardb,placrosse/ardb,placrosse/ardb,cloudrain21/ardb,cloudrain21/ardb