High CPU Load by php-cgi

[Sina]

hello ,
i configured nginx with php-cgi but a problem is now happening and my
CPU Load is high but there is not high requests....
rather when visitors start leeching(rapidleech) php-cgi starts making
highly loads...
look this screenshot :

 [img]http://host16.globat.com/files/2j992a5506h5obmaahfb.png[/img]

i dont know why php-cgi makes highly CPU Load average .....

have you any problem like this ??
please help me !!

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,117162,117162#msg-117162