One reason why your push will never see the light

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Push notifications often crashes  Apache
Many may be the reasons why your push notifications will never see the light of day.

One of them is the configuration of mpm_prefork.conf in apache.

When you send a push notification your server will generate loading and in some cases high loading .

The CPU will be 100% and in error log you will find this error:

AH00161: server reached MaxRequestWorkers setting, consider raising the MaxRequestWorkers setting
Apache will grow and your pushes will never be sent.

or

AH00180: WARNING: MaxRequestWorkers of 512 exceeds ServerLimit value of
 256 servers, decreasing MaxRequestWorkers to 256.
 To increase, please see the ServerLimit directive.

The solution is to set up well : <IfModule mpm_prefork_module>

That’s the rule:

To increase it, you must also raise MaxRequestWorkers using the following formula: ServerLimit value x 25 = MaxRequestWorkers value. For example, if ServerLimit set to 20, then MaxRequestWorkers will be 20 x 25 = 500. MPM Prefork: The default MaxRequestWorkers value is 256.

For this reason a good configuration could be the following :

you should edit mpm_prefork

<IfModule mpm_prefork_module>
StartServers 10
MinSpareServers 10
MaxSpareServers 20
ServerLimit 2000
MaxRequestWorkers 1500
MaxConnectionsPerChild 10000
</IfModule>

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