How to solve mod_fcgid: can't apply process slot ?

mod_fcgid: can't apply process slot for varwwwcgi-bincgi_wrappercgi_wrapper Then Apache gives 503 HTML file or server OK

can't seem to get rid of it on a high traffic sites mod_fcgid: can't apply process slot for c:php Seems to happen every so

mod_fcgid_ can''t apply process slot mod_fcgid: can't apply process slot for varwwwcgi-bincgi_wrappercgi_wrapper, referer: acp?option8

mod_fcgid_ can''t apply process slot for Code: mod_fcgid: can't apply process slot for varwwwcgi-bincgi_wrappercgi_wrapper Connection reset by peer: mod_fcgid: error reading