Hi I have centos with httpd-2.2.3-63.el5.centos.1, Since last few days I am getting the Max client request error in apache error log. then I increased my limit of Maxclient 256 to 400 then after I getting the same error in error log, and when I looked at apache access.log I dont found that much request on server. this happen only one or two time in a day. I checked the error log access log and /var/log/message files also but nothing found suspicious in log file. Please guide any further step that I can help to dignose in this problem. I checked log file and access file there is not found any DOS attack clue also.