My server Down MaxRequestWorkers

Hello,

My server down and I check apache log and recived this:

[Fri Jan 30 05:27:48.795468 2015] [mpm_event:error] [pid 15710:tid 139807952553920] AH00485: scoreboard is full, not at MaxRequestWorkers

[Fri Jan 30 05:27:49.796058 2015] [mpm_event:error] [pid 15710:tid 139807952553920] AH00485: scoreboard is full, not at MaxRequestWorkers

[Fri Jan 30 05:27:50.797470 2015] [mpm_event:error] [pid 15710:tid 139807952553920] AH00485: scoreboard is full, not at MaxRequestWorkers

[Fri Jan 30 05:27:51.798881 2015] [mpm_event:error] [pid 15710:tid 139807952553920] AH00485: scoreboard is full, not at MaxRequestWorkers

[Fri Jan 30 05:27:52.800239 2015] [mpm_event:error] [pid 15710:tid 139807952553920] AH00485: scoreboard is full, not at MaxRequestWorkers



My server configuration is:

Nginx_apache

Apache 2.4.10

php_fpm 5.4



Apache configuration in /etc/httpd/conf/extra/httpd-mpm.conf is:

<IfModule mpm_event_module>

StartServers 6

MinSpareThreads 32

MaxSpareThreads 128

ThreadsPerChild 64

ServerLimit 16

MaxRequestWorkers 1024

MaxConnectionsPerChild 10000

</IfModule>



I checked other thread and set the following in my /etc/sysctl.conf and reboot server.

kernel.msgmni = 1024

kernel.sem = 250 256000 32 1024



But after a few days I get "scoreboard is full, not at MaxRequestWorkers" error in apache logs and my server down.

What to do?

Why my server down?

Thank you

My server Down MaxRequestWorkers