PHP error.log: server reached max_children setting

[Floezen]

Hi,

my php error.log shows following warnings regularly:

WARNING: [pool mydomain.de] server reached max_children setting (5), consider raising it

I know max_children from apache, but does this also exist for PHP?

Can it be solved by adding

pm.max_children = 10

in the "Additional directives" of the Plesk PHP settings (https://server.tdl:8443/smb/web/php-settings/id/1)?

Does ist make sense to do so? (Our server currently would not have a problem to server more requests...

Thanks for your advices,
Flözen