[squid-users] Cache Manager showing choke value

Dear All,

I am having squid 3.3.1-20130213-r12492 running on CenOS 6.3 x64. I enable
SMP with three worker on this squid server.

I am getting strange negative number from cachemgr.cgi at

Cache information for squid:
Hits as % of bytes sent: 5min: 9.3%, 60min: *-634.1%*

Would you advice me why I am getting this negative value?

-- 
Regards,
YOUK Sokvantha
Tell: (855) 89896589
email: sokvantha_at_gmail.com