Hi,
with my hosting we have verified a CPU overload.
Investigating about this, we have checked the logs and found out what happens when reloading a page:
79.3.19.158 - - [11/Aug/2016:12:43:06 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:07 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:08 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:09 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:10 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:11 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:11 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:12 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:13 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:14 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:15 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:16 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:17 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:18 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:19 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:20 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
79.3.19.158 - - [11/Aug/2016:12:43:21 +0200] "POST /tickets/index.php?option=com_ampz&task=cacheCounts HTTP/1.0" 404 5904 "https://www.mywebsite.com/tickets/mypage.html" "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0"
The CPU overload ends if we block momentarily the two ip with the firewall.
How can I solve this issue?
Regards