Get 502 Bad Gateway error per day

[arazit]

Hello,
I get per day 502 Bad Gateway error and my server sites can not be load.
I used from nginx_apache with php-fpm 5.4
I see this errors in apache log:
[Thu Oct 23 21:15:48.733177 2014] [mpm_event:error] [pid 5027:tid 139981271480256] AH00485: scoreboard is full, not at MaxRequestWorkers
[Thu Oct 23 21:15:49.734436 2014] [mpm_event:error] [pid 5027:tid 139981271480256] AH00485: scoreboard is full, not at MaxRequestWorkers
[Thu Oct 23 21:15:50.735708 2014] [mpm_event:error] [pid 5027:tid 139981271480256] AH00485: scoreboard is full, not at MaxRequestWorkers
[Thu Oct 23 21:15:51.737030 2014] [mpm_event:error] [pid 5027:tid 139981271480256] AH00485: scoreboard is full, not at MaxRequestWorkers


I increase MaxRequestWorkers to this but get error yet:
<IfModule mpm_event_module>
StartServers 2
MinSpareThreads 16
MaxSpareThreads 64
ThreadsPerChild 32
ServerLimit 16
MaxRequestWorkers 448
MaxConnectionsPerChild 1000
</IfModule>
Thank you

 

[smtalk]

Please check http://help.directadmin.com/item.php?id=495 & tune up your httpd-mpm.conf (which might be the main cause for you)

 

[arazit]

I get error yet.
My httpd-mpm.conf config is:
<IfModule mpm_event_module>
StartServers 6
MinSpareThreads 32
MaxSpareThreads 128
ThreadsPerChild 64
ServerLimit 16
MaxRequestWorkers 1024
MaxConnectionsPerChild 10000
</IfModule>