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mavera2
Basic Pleskian
In the last week suddenly I get errors for my server. I try to access my website I get 503 errors.
When I check "top" and other things I see these:
- 60-65 httpd (apache) processes. (Normally I have 30-35 httpd processes)
You can see graph here: http://s30.postimg.org/6oenl3vc1/httpd.jpg
- MySQL makes ~350 MB swap. (Normally it makes 40-50 MB swap)
Tuning primer says that:
* Current max_connections = 250
* Current threads_connected = 96
* Historic max_used_connections = 97
- Server all graphs: http://s29.postimg.org/3wm5fh5jr/general.jpg
- Inside "httpd.conf"
* ServerLimit 60
* MaxClients 60
- In "var\www\vhosts\example.com\logs\access_log" there is nothing that would seem like (D)DOS attack. I see normal server request.
- Nothing suspicious in "var\log\httpd\access_log"
- Inside my `var\www\vhosts\example.com\logs\error_log` I see too many errors like this:
* [Fri Jan 17 10:56:26 2014] [warn] [client 78.180.71.157] mod_fcgid: can't apply process slot for /var/www/cgi-bin/cgi_wrapper/cgi_wrapper
- Inside "\var\log\mysqld_log" no error
- Inside "\var\log\error_log" no error in that time
- Inside "\var\log\suexec_log" no error
How can I diagnose what causes my website to make DISK IO 100%, load average 10, very high swapping, and server doesn't respond requests. And how can I stop this to happen in future ?
When I restart mysql and httpd problem solves. But how can I diagnose the cause ?
Thank you in advance for your help.
When I check "top" and other things I see these:
- 60-65 httpd (apache) processes. (Normally I have 30-35 httpd processes)
You can see graph here: http://s30.postimg.org/6oenl3vc1/httpd.jpg
- MySQL makes ~350 MB swap. (Normally it makes 40-50 MB swap)
Tuning primer says that:
* Current max_connections = 250
* Current threads_connected = 96
* Historic max_used_connections = 97
- Server all graphs: http://s29.postimg.org/3wm5fh5jr/general.jpg
- Inside "httpd.conf"
* ServerLimit 60
* MaxClients 60
- In "var\www\vhosts\example.com\logs\access_log" there is nothing that would seem like (D)DOS attack. I see normal server request.
- Nothing suspicious in "var\log\httpd\access_log"
- Inside my `var\www\vhosts\example.com\logs\error_log` I see too many errors like this:
* [Fri Jan 17 10:56:26 2014] [warn] [client 78.180.71.157] mod_fcgid: can't apply process slot for /var/www/cgi-bin/cgi_wrapper/cgi_wrapper
- Inside "\var\log\mysqld_log" no error
- Inside "\var\log\error_log" no error in that time
- Inside "\var\log\suexec_log" no error
How can I diagnose what causes my website to make DISK IO 100%, load average 10, very high swapping, and server doesn't respond requests. And how can I stop this to happen in future ?
When I restart mysql and httpd problem solves. But how can I diagnose the cause ?
Thank you in advance for your help.
Last edited:
