Error in my web page

I use apache 2.4 running on redhat , I just found in my webpage ( main page ) , there is the below message appears . {nocache: xxx} what is wrong in my web server ? -- Sent from:

analysis the log

I have a web page running apache on redhat , there are a apache access log , each day have a log , we have keep these old logs I would like to do the analysis for the user access behavior , for example , which url they are most access , the peak time they access the web etc. Would advise how