I want to know the meanings of variuos codes in eventtype column like what does eventtype 8192 means. etc.

Hi, According to your description, I have found a thread to be similar to your problem, I hope it can help you a little. Please refer to: http://social.technet.microsoft.com/Forums/en/sharepointadmin/thread/290bd659-cbb2-49da-9c63-df951fa3e893 Best Regards David Hu

I have already seen that post. But the solution to my query is here : Just type "[MS-WSSDLIM2].pdf" on google and you will find a pdf document that contains meanings of all the codes of Content Database. :)